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Note 15 - Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2014
Stockholders' Equity Note [Abstract] |
Schedule of Stockholders Equity [Table Text Block] |
|  | Nine Months Ended September 30, |
|  | 2014 |
|  | (in thousands) |
Stockholders’ equity as of December 31, 2013 |  | $ | 251,545 |
Net loss |  |  | (8,178 | )
Accumulated other comprehensive loss |  |  | (1,803 | )
Common stock issued through initial public offering |  |  | 38,018 |
Common stock issued to employees, net of shares withheld |  |  | (485 | )
Cost related to public offering |  |  | (3,358 | )
Exercise of stock options |  |  | 701 |
Nonemployee share-based compensation expense |  |  | 728 |
Employee share-based compensation expense |  |  | 5,952 |
Stockholders’ equity as of September 30, 2014 |  | $ | 283,120 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Average volatility |  |  | — |  |  |  | 28.3 | % |  |  | 29.9 | % |  |  | 28.5 | %
Risk-free interest rate |  |  | — |  |  |  | 1.2 | % |  |  | 1.7 | % |  |  | 1.2 | %
Weighted-average expected life in years |  |  | — |  |  |  | 4.4 |  |  |  | 5.0 |  |  |  | 4.4 |
Dividend yield rate |  |  | — |  |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
Schedule of Stock Options Roll Forward [Table Text Block] |
|  | Options |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value(1) |
|  |  |  |  |  |  |  |  |  |  | (in thousands) |
Outstanding as of December 31, 2013 |  |  | 10,771,755 |  |  | $ | 15.39 |  |  |  |  |  |  |
Options granted |  |  | 1,661,862 |  |  |  | 15.04 |  |  |  |  |  |  |
Options exercised |  |  | (65,000 | ) |  |  | 10.79 |  |  |  |  |  |  |
Options cancelled |  |  | (60,198 | ) |  |  | 12.11 |  |  |  |  |  |  |
Options expired |  |  | (796,988 | ) |  |  | 18.86 |  |  |  |  |  |  |
Outstanding as of September 30, 2014 |  |  | 11,511,431 |  |  | $ | 15.14 |  |  |  | 4.87 |  |  | $ | 1,975 |
Exercisable as of September 30, 2014 |  |  | 5,732,361 |  |  | $ | 17.27 |  |  |  | 3.60 |  |  | $ | 806 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
| Three Months Ended September 30, |  | Nine Months Ended September 30, |
| 2014 |  | 2013 |  | 2014 |  | 2013 |
| (in thousands, except per share data) |
Weighted-average grant date fair value |  | $ | — |  |  | $ | 2.50 |  |  | $ | 4.02 |  |  | $ | 2.54 |
Intrinsic value of options exercised |  |  | 283 |  |  |  | 4 |  |  |  | 144 |  |  |  | (1 | )
Cash received |  |  | 130 |  |  |  | 38 |  |  |  | 701 |  |  |  | 51 |
Total fair value of the options vested during the year |  |  | 3,510 |  |  |  | 3,203 |  |  |  | 4,324 |  |  |  | 4,056 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Options |  |  | Weighted-Average Grant Date Fair Value |
Nonvested as of December 31, 2013 |  |  | 5,617,554 |  |  | $ | 3.12 |
Options granted |  |  | 1,661,862 |  |  |  | 4.02 |
Options vested |  |  | (1,440,148 | ) |  |  | 3.00 |
Options forfeited |  |  | (60,198 | ) |  |  | 4.35 |
Nonvested as of September 30, 2014 |  |  | 5,779,070 |  |  |  | 3.39 |
Schedule of Share-based Compensation, Activity [Table Text Block] |
|  | Total DSUs Issued |  |  | Total Fair Market Value of DSUs Issued as Compensation (1) |
|  |  |  |  | (in thousands) |
DSUs outstanding at December 31, 2013 |  |  | 98,495 |  |  |  |
DSUs granted |  |  | 449,544 |  |  | $ | 6,389 |
DSUs forfeited |  |  | (994 | ) |  |  |  |
Common stock delivered |  |  | (9,497 | ) |  |  |  |
DSUs surrendered for taxes |  |  | (7,774 | ) |  |  |  |
DSUs outstanding at September 30, 2014 |  |  | 529,774 |  |  |  |  |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- 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
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- 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
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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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