XML 19 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Jan. 31, 2013
Stock- Based Compensation [Abstract] |
Summary of activity under Option and Stock Plans |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Term (years) |  |  | Weighted Average Fair Value |
Outstanding, January 31, 2011 |  |  | 675,724 |  |  | $ | 11.29 |  |  |  | 5.78 |  |  | $ | 5.79 |
Granted |  |  | 212,500 |  |  | $ | 13.92 |  |  |  |  |  |  |  |  |
Exercised |  |  | (55,038 | ) |  | $ | 9.36 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (16,000 | ) |  | $ | 11.36 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2012 |  |  | 817,186 |  |  | $ | 12.10 |  |  |  | 4.94 |  |  | $ | 5.68 |
Granted |  |  | 293,000 |  |  | $ | 17.36 |  |  |  |  |  |  |  |  |
Exercised |  |  | (153,962 | ) |  | $ | 9.33 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (30,000 | ) |  | $ | 8.66 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2013 |  |  | 926,224 |  |  | $ | 14.34 |  |  |  | 5.39 |  |  | $ | 5.93 |
Exercisable, January 31, 2013 |  |  | 633,224 |  |  | $ | 12.94 |  |  |  | 4.37 |  |  | $ | 6.06 |
Summary of change in number of non-vested options to purchase shares of common stock |
|  | Shares |  |  | Weighted Average Fair Value |
Non-vested, January 31, 2011 |  |  | 237,000 |  |  | $ | 6.31 |
Granted |  |  | 212,500 |  |  | $ | 5.09 |
Vested |  |  | (232,000 | ) |  | $ | 6.34 |
Forfeited |  |  | (5,000 | ) |  | $ | 4.98 |
Non-vested, January 31, 2012 |  |  | 212,500 |  |  | $ | 5.09 |
Granted |  |  | 293,000 |  |  | $ | 5.65 |
Vested |  |  | (207,500 | ) |  | $ | 5.06 |
Forfeited |  |  | (5,000 | ) |  | $ | 6.32 |
Non-vested, January 31, 2013 |  |  | 293,000 |  |  | $ | 5.65 |
Summary of assumptions used to estimate fair value of stock options granted |
|  | 2013 |  | 2012
Risk-free interest rate |  | 1.93% |  | 2.57%
Expected volatility |  | 35.51% |  | 44.88%
Expected life |  | 4.56 years |  | 4.26 years
Dividend yield |  | —% |  | —%

X
- Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration