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Stockholders' Equity - Stock Options Outstanding and Exercisable (Details) | 12 Months Ended
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Dec. 31, 2016 $ / shares shares
Range One |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | $ 3.46
Range of Exercise Prices, Upper Range Limit | $ 3.92
Options Outstanding, Number of Shares | shares | 47,935
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 2 years 2 months 5 days
Options Outstanding, Weighted Average Exercise Price | $ 3.84
Options Vested and Exercisable, Number of Shares Exercisable | shares | 47,164
Options Vested and Exercisable, Weighted Average Exercise Price | $ 3.84
Range Two |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 3.95
Range of Exercise Prices, Upper Range Limit | $ 5.92
Options Outstanding, Number of Shares | shares | 73,182
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 2 years 10 months 13 days
Options Outstanding, Weighted Average Exercise Price | $ 5.01
Options Vested and Exercisable, Number of Shares Exercisable | shares | 60,241
Options Vested and Exercisable, Weighted Average Exercise Price | $ 4.86
Range Three |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 6.00
Range of Exercise Prices, Upper Range Limit | $ 8.16
Options Outstanding, Number of Shares | shares | 82,169
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 5 years 2 months 9 days
Options Outstanding, Weighted Average Exercise Price | $ 7.38
Options Vested and Exercisable, Number of Shares Exercisable | shares | 35,615
Options Vested and Exercisable, Weighted Average Exercise Price | $ 7.08
Range Four |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 8.29
Range of Exercise Prices, Upper Range Limit | $ 8.58
Options Outstanding, Number of Shares | shares | 60,799
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 4 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price | $ 8.45
Options Vested and Exercisable, Number of Shares Exercisable | shares | 38,325
Options Vested and Exercisable, Weighted Average Exercise Price | $ 8.45
Range Five |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 8.60
Range of Exercise Prices, Upper Range Limit | $ 10.33
Options Outstanding, Number of Shares | shares | 59,500
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 4 years 11 months 16 days
Options Outstanding, Weighted Average Exercise Price | $ 9.39
Options Vested and Exercisable, Number of Shares Exercisable | shares | 27,067
Options Vested and Exercisable, Weighted Average Exercise Price | $ 9.10
Range Six |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 10.45
Range of Exercise Prices, Upper Range Limit | $ 10.45
Options Outstanding, Number of Shares | shares | 400
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 5 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price | $ 10.45
Options Vested and Exercisable, Number of Shares Exercisable | shares | 200
Options Vested and Exercisable, Weighted Average Exercise Price | $ 10.45
Range Seven |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 10.73
Range of Exercise Prices, Upper Range Limit | $ 10.73
Options Outstanding, Number of Shares | shares | 61,223
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 5 years 1 month 24 days
Options Outstanding, Weighted Average Exercise Price | $ 10.73
Options Vested and Exercisable, Number of Shares Exercisable | shares | 26,098
Options Vested and Exercisable, Weighted Average Exercise Price | $ 10.73
Range Eight |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 11.04
Range of Exercise Prices, Upper Range Limit | $ 11.04
Options Outstanding, Number of Shares | shares | 15,800
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 5 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price | $ 11.04
Options Vested and Exercisable, Number of Shares Exercisable | shares | 885
Options Vested and Exercisable, Weighted Average Exercise Price | $ 11.04
Range Nine |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 12.85
Range of Exercise Prices, Upper Range Limit | $ 12.85
Options Outstanding, Number of Shares | shares | 32,500
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 6 years 9 months 26 days
Options Outstanding, Weighted Average Exercise Price | $ 12.85
Options Vested and Exercisable, Number of Shares Exercisable | shares | 118
Options Vested and Exercisable, Weighted Average Exercise Price | $ 12.85
Range Ten |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 16.29
Range of Exercise Prices, Upper Range Limit | $ 16.29
Options Outstanding, Number of Shares | shares | 37,477
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 6 years 6 months 26 days
Options Outstanding, Weighted Average Exercise Price | $ 16.29
Options Vested and Exercisable, Number of Shares Exercisable | shares | 686
Options Vested and Exercisable, Weighted Average Exercise Price | $ 16.29
Range Eleven |
Stock options outstanding and exercisable |
Range of Exercise Prices, Lower Range Limit | 3.46
Range of Exercise Prices, Upper Range Limit | $ 16.29
Options Outstanding, Number of Shares | shares | 470,985
Options Outstanding, Weighted Average Remaining Contractual Life (years) | 4 years 6 months 29 days
Options Outstanding, Weighted Average Exercise Price | $ 8.69
Options Vested and Exercisable, Number of Shares Exercisable | shares | 236,399
Options Vested and Exercisable, Weighted Average Exercise Price | $ 6.77

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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 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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- 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 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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