Quarterly report pursuant to Section 13 or 15(d)

Incentive and Non-Statutory Stock Option Plan - Components of Common Stock Purchase Options and Warrants (Details)

v2.4.1.9
Incentive and Non-Statutory Stock Option Plan - Components of Common Stock Purchase Options and Warrants (Details) (USD $)
9 Months Ended 12 Months Ended
Mar. 31, 2015
Jun. 30, 2014
Warrants [Member]    
Number of shares, Outstanding Beginning 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Number of shares, Granted     
Number of shares, Exercised     
Number of shares, Expired / Cancelled     
Number of shares, Outstanding Ending 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of shares, Exercisable 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Weighted Ave Exercise Price, Outstanding Beginning $ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Weighted Ave Exercise Price, Granted     
Weighted Ave Exercise Price, Exercised     
Weighted Ave Exercise Price, Expired / Cancelled     
Weighted Ave Exercise Price, Outstanding Ending $ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Ave Exercise Price, Exercisable $ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Weighted Average Remaining Contractual Life, Outstanding 1 year 5 months 16 days 2 years 2 months 12 days
Weighted Average Remaining Contractual Life, Exercisable 1 year 5 months 16 days  
Aggregated Intrinsic Value, Outstanding     
Aggregated Intrinsic Value, Exercisable     
Options [Member]    
Number of shares, Outstanding Beginning 757,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Number of shares, Granted     
Number of shares, Exercised (30,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Number of shares, Expired / Cancelled     
Number of shares, Outstanding Ending 727,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
757,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
Number of shares, Exercisable 602,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Weighted Ave Exercise Price, Outstanding Beginning $ 6.65us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Weighted Ave Exercise Price, Granted     
Weighted Ave Exercise Price, Exercised $ 3.88us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Weighted Ave Exercise Price, Expired / Cancelled     
Weighted Ave Exercise Price, Outstanding Ending $ 6.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
$ 6.65us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
Weighted Ave Exercise Price, Exercisable $ 7.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= ntwk_EmployeeStockOptionOneMember
 
Weighted Average Remaining Contractual Life, Outstanding 1 year 5 months 19 days 2 years 2 months 12 days
Weighted Average Remaining Contractual Life, Exercisable 1 year 6 months 4 days  
Aggregated Intrinsic Value, Outstanding     
Aggregated Intrinsic Value, Exercisable