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Stockholders' Equity - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended
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Sep. 30, 2011 | Mar. 31, 2011 | Sep. 24, 2008 | Jun. 27, 2008 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2011 | Sep. 30, 2011 2005 Management Stock Option Plan | Nov. 30, 2007 2005 Management Stock Option Plan | Jun. 30, 2013 2005 Management Stock Option Plan | Jun. 30, 2012 2005 Management Stock Option Plan | Jun. 30, 2011 2005 Management Stock Option Plan | Jun. 30, 2013 2005 Management Stock Option Plan Maximum | Sep. 30, 2011 2005 Stock Incentive Plan | Feb. 28, 2009 2005 Stock Incentive Plan | Jun. 30, 2013 2005 Stock Incentive Plan | Jun. 30, 2012 2005 Stock Incentive Plan | Jun. 30, 2011 2005 Stock Incentive Plan | Jun. 30, 2013 2000 Non-Management Stock Option Plan | Jun. 30, 2011 2000 Non-Management Stock Option Plan | Jun. 30, 2013 1998 Stock Plan | Jun. 30, 2011 1998 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, authorized |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock par value per share |  |  |  |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, outstanding |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase shares of common stock |  |  | 1,525,515 | 73,889 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price |  |  | $ 0.95 | $ 0.90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants expected life |  |  | 3 years | 3 years | 4 years 6 months | 4 years 5 months 23 days | 4 years 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected stock price volatility |  |  | 80.00% | 80.00% | 85.00% | 85.00% | 82.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  | 2.26% | 3.14% | 0.80% | 0.97% | 1.82% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period of warrants |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercised | 307,022 | 1,218,493 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock due to exercise of warrants | 238,393 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased in shares |  |  |  |  |  |  |  | 500,000 | 500,000 |  |  |  |  | 1,000,000 | 1,000,000 |  |  |  |  |  |  |
Option granted at price not less than percentage of fair market value of the common stock on the date of grant |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  | 85.00% |  | 85.00% |
Right of repurchase, lapse rate with respect to shares granted |  |  |  |  |  |  |  |  |  | 2.08% |  |  |  |  |  |  |  |  |  |  |  |
Exercisable period from the date of grant |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |
Option vest, minimum years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  | 4 years |  | 4 years |
Option vest, maximum years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  | 10 years |  | 10 years |
Plan expired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | July 2010 |  | November 2010 |
Closing stock price |  |  |  |  | $ 9.62 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value of the options exercised during the period |  |  |  |  | $ 3,000,000 | $ 691,000 | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted during period |  |  |  |  | 338,550 | 720,300 | 280,450 |  |  |  | 340,000 | 115,000 |  |  |  | 338,550 | 380,300 | 165,450 |  | (25,953) |  | (39,216)
Options granted during period, weighted-average price |  |  |  |  | $ 4.05 | $ 3.21 | $ 1.21 |  |  |  | $ 4.56 | $ 1.97 |  |  |  | $ 6.48 | $ 5.53 | $ 1.89 |  | $ 0.90 |  | $ 0.73
Option granted but not yet vested |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected to be recognized |  |  |  |  | 1 year 4 months 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Net number of share options (or share units) granted during 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 (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 65 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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