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Exercise Price for Options Outstanding and Options Exercisable (Detail) (USD $) | 6 Months Ended
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Sep. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Options Outstanding, Number of Shares | 3,388,753
Options Exercisable, Number of Shares | 489,448
$2.50 - 2.75 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Range of Exercise Price, lower limit | $ 2.50
Range of Exercise Price, upper limit | $ 2.75
Options Outstanding, Number of Shares | 911,000
Options Exercisable, Number of Shares | 110,167
Options Outstanding, Weighted Average Exercise Price | $ 2.61
Options Exercisable, Weighted Average Exercise Price | $ 2.65
Options Outstanding, Weighted Average Remaining Life (Years) | 9 years 26 days
Options Exercisable,Weighted Average Remaining Life (Years) | 9 years 29 days
$2.76 - 2.85 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Range of Exercise Price, lower limit | $ 2.76
Range of Exercise Price, upper limit | $ 2.85
Options Outstanding, Number of Shares | 372,836
Options Exercisable, Number of Shares | 33,180
Options Outstanding, Weighted Average Exercise Price | $ 2.83
Options Exercisable, Weighted Average Exercise Price | $ 2.83
Options Outstanding, Weighted Average Remaining Life (Years) | 9 years 4 days
Options Exercisable,Weighted Average Remaining Life (Years) | 9 years 4 days
$3.85 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Exercise Price | $ 3.85
Options Outstanding, Number of Shares | 112,302
Options Exercisable, Number of Shares | 44,146
Options Outstanding, Weighted Average Exercise Price | $ 3.85
Options Exercisable, Weighted Average Exercise Price | $ 3.85
Options Outstanding, Weighted Average Remaining Life (Years) | 8 years 10 months 2 days
Options Exercisable,Weighted Average Remaining Life (Years) | 8 years 10 months 2 days
$4.00 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Exercise Price | $ 4.00
Options Outstanding, Number of Shares | 714,554
Options Exercisable, Number of Shares | 85,173
Options Outstanding, Weighted Average Exercise Price | $ 4.00
Options Exercisable, Weighted Average Exercise Price | $ 4.00
Options Outstanding, Weighted Average Remaining Life (Years) | 9 years 6 months 7 days
Options Exercisable,Weighted Average Remaining Life (Years) | 8 years 9 months
$4.05 - 4.11 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Range of Exercise Price, lower limit | $ 4.05
Range of Exercise Price, upper limit | $ 4.11
Options Outstanding, Number of Shares | 589,061
Options Exercisable, Number of Shares | 34,449
Options Outstanding, Weighted Average Exercise Price | $ 4.10
Options Exercisable, Weighted Average Exercise Price | $ 4.06
Options Outstanding, Weighted Average Remaining Life (Years) | 9 years 7 months 21 days
Options Exercisable,Weighted Average Remaining Life (Years) | 8 years 9 months
$4.23 - 4.5 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Range of Exercise Price, lower limit | $ 4.23
Range of Exercise Price, upper limit | $ 4.5
Options Outstanding, Number of Shares | 579,000
Options Exercisable, Number of Shares | 152,333
Options Outstanding, Weighted Average Exercise Price | $ 4.43
Options Exercisable, Weighted Average Exercise Price | $ 4.48
Options Outstanding, Weighted Average Remaining Life (Years) | 8 years 10 months 17 days
Options Exercisable,Weighted Average Remaining Life (Years) | 8 years 9 months
$4.65 - $5.89 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Range of Exercise Price, lower limit | $ 4.65
Range of Exercise Price, upper limit | $ 5.89
Options Outstanding, Number of Shares | 110,000
Options Exercisable, Number of Shares | 30,000
Options Outstanding, Weighted Average Exercise Price | $ 5.21
Options Exercisable, Weighted Average Exercise Price | $ 4.65
Options Outstanding, Weighted Average Remaining Life (Years) | 9 years 1 month 28 days
Options Exercisable,Weighted Average Remaining Life (Years) | 8 years 5 months 27 days

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- Definition Change in the weighted average exercise price of options outstanding. + References No definition available. + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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 of exercisable stock options, 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)(2) -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 number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans 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 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 Weighted average remaining contractual term of outstanding stock options, 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 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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