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Stock Options and Restricted Stock Awards (Details) (USD $) | 3 Months Ended | 6 Months Ended | 0 Months Ended
--- | --- | --- | ---
Sep. 30, 2013 Stock Options [Member] | Sep. 30, 2013 Stock Options [Member] | Sep. 30, 2012 Stock Options [Member] | Sep. 03, 2013 Restricted Stock [Member] Installment
Summary of Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted [Abstract] |  |  |  |
Weighted average risk free interest rate (in hundredths) |  | 1.94% | 1.03% |
Weighted average expected holding period (years) |  | 5 years 11 months 16 days | 6 years 5 months 23 days |
Weighted average expected volatility (in hundredths) |  | 48.52% | 42.86% |
Weighted average expected dividend yield (in hundredths) |  | 0.00% | 0.00% |
Weighted average fair value of options granted (in dollars per share) |  | $ 4.42 | $ 3.04 |
Number of Shares [Roll Forward] |  |  |  |
Outstanding at beginning of period (in shares) |  | 1,970,084 |  |
Granted (in shares) | 266,000 | 272,000 | 6,000 |
Exercised (in shares) |  | 0 |  |
Cancelled (in shares) |  | (152,450) |  |
Outstanding at end of period (in shares) | 2,089,634 | 2,089,634 |  |
Weighted Average Exercise Price [Roll Forward] |  |  |  |
Outstanding at beginning of period (in dollars per share) |  | $ 8.73 |  |
Granted (in dollars per share) |  | $ 9.25 |  |
Exercised (in dollars per share) |  | $ 0 |  |
Cancelled (in dollars per share) |  | $ 7.44 |  |
Outstanding at end of period (in dollars per share) | $ 8.89 | $ 8.89 |  |
Number of stock options exercisable (in shares) | 1,515,933 | 1,515,933 |  |
Weighted average exercise price of stock options exercisable (in dollars per share) | $ 9.31 | $ 9.31 |  |
Number of Shares [Roll Forward] |  |  |  |
Non-vested at beginning of period (in shares) |  | 420,401 |  |
Granted (in shares) | 266,000 | 272,000 | 6,000 |
Vested (in shares) |  | (6,000) |  |
Cancelled (in shares) |  | (112,700) |  |
Non-vested at end of period (in shares) | 573,701 | 573,701 |  |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |
Non-vested at beginning of period (in dollars per share) |  | $ 2.93 |  |
Granted (in dollars per share) |  | $ 4.42 | $ 3.04 |
Vested (in dollars per share) |  | $ 3.98 |  |
Cancelled (in dollars per share) |  | $ 2.92 |  |
Non-vested at end of period (in dollars per share) | $ 3.63 | $ 3.63 |  |
Total unrecognized compensation expense | $ 1,998,000 | $ 1,998,000 |  |
Weighted average vesting period over which compensation expense is expected to be recognized |  | 2 years 2 months 12 days |  |
Summary of restricted stock transactions [Abstract] |  |  |  |
Granted (in shares) |  |  |  | 138,000
Closing market price of shares granted (in dollars per share) |  |  |  | $ 9.32
Number of equal annual installments in which awards vest |  |  |  | 3
Fair value to be recognized as compensation expense |  |  |  | $ 1,286,000

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, 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 S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- 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 price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + 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 price at which grantees can acquire the shares reserved for issuance 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)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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