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Incentive and Non-Statutory Stock Option Plan - Schedule of Stock Options and Warrants Outstanding and Exercisable Activity (Details) (USD $) | 6 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Jun. 30, 2014
Warrants [Member] |  |
Number Outstanding, shares | 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember
Weighted Average Remaining Contractual Life |  | 2 years 2 months 12 days
Weighted Ave Exericse Price | $ 7.29us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Number Exercisable | 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Remaining Contractual Life | 1 year 8 months 16 days |
Weighted Ave Exericse Price | $ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Options [Member] |  |
Number Outstanding, shares | 727,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember | 757,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember
Weighted Average Remaining Contractual Life | 1 year 8 months 16 days | 2 years 2 months 12 days
Weighted Ave Exericse Price | $ 6.76us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember |
Number Exercisable | 477,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember |
Weighted Average Remaining Contractual Life | 1 year 9 months 29 days |
Weighted Ave Exericse Price | $ 8.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember |
Price Range One [Member] | Warrants [Member] |  |
Exercise Price, Lower | $ 5.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Exercise Price, Upper | $ 7.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Number Outstanding, shares | 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Remaining Contractual Life | 1 year 8 months 16 days |
Weighted Ave Exericse Price | $ 7.29us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Number Exercisable | 163,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Remaining Contractual Life | 1 year 8 months 16 days |
Weighted Ave Exericse Price | $ 7.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Price Range One [Member] | Options [Member] |  |
Exercise Price, Lower | $ 0.10us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Exercise Price, Upper | $ 9.90us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Number Outstanding, shares | 653,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Weighted Average Remaining Contractual Life | 1 year 9 months 4 days |
Weighted Ave Exericse Price | $ 4.81us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Number Exercisable | 403,462us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Weighted Average Remaining Contractual Life | 1 year 11 months 5 days |
Weighted Ave Exericse Price | $ 5.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeOneMember |
Price Range Two [Member] | Options [Member] |  |
Exercise Price, Lower | $ 10.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Exercise Price, Upper | $ 19.90us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Number Outstanding, shares | 14,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Weighted Average Remaining Contractual Life | 1 year 1 month 13 days |
Weighted Ave Exericse Price | $ 18.18us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Number Exercisable | 14,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Weighted Average Remaining Contractual Life | 1 year 1 month 13 days |
Weighted Ave Exericse Price | $ 18.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeTwoMember |
Price Range Three [Member] | Options [Member] |  |
Exercise Price, Lower | $ 20.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |
Exercise Price, Upper | $ 29.90us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |
Number Outstanding, shares | 60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |
Weighted Average Remaining Contractual Life | 1 year 3 months 29 days |
Weighted Ave Exericse Price | $ 25.33us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |
Number Exercisable | 60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |
Weighted Average Remaining Contractual Life | 1 year 3 months 29 days |
Weighted Ave Exericse Price | $ 25.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = ntwk_EmployeeStockOptionOneMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = ntwk_PriceRangeThreeMember |

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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