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Stockholders' Equity - Options Outstanding and Exercisable (Details) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 602,207
Weighted Average Remaining Contractual Life (in years) | 8 years 1 month 13 days
Weighted Average Exercise Price (in dollars per share) | $ 8.58
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 304,610
Weighted Average Remaining Contractual Life (in years) | 7 years 1 month 17 days
Weighted Average Exercise Price (in dollars per share) | $ 9.38
Exercise price, range one |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, lower limit (in dollars per share) | 2.30
Range of Exercise Prices, upper limit (in dollars per share) | $ 4.00
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 61,218
Weighted Average Remaining Contractual Life (in years) | 7 years 3 months 7 days
Weighted Average Exercise Price (in dollars per share) | $ 2.33
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 60,586
Weighted Average Remaining Contractual Life (in years) | 7 years 3 months 7 days
Weighted Average Exercise Price (in dollars per share) | $ 2.33
Exercise price, range two |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, lower limit (in dollars per share) | 4.01
Range of Exercise Prices, upper limit (in dollars per share) | $ 4.45
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 132,778
Weighted Average Remaining Contractual Life (in years) | 8 years 26 days
Weighted Average Exercise Price (in dollars per share) | $ 4.10
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 114,187
Weighted Average Remaining Contractual Life (in years) | 8 years 26 days
Weighted Average Exercise Price (in dollars per share) | $ 4.10
Exercise price, range three |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, lower limit (in dollars per share) | 4.46
Range of Exercise Prices, upper limit (in dollars per share) | $ 5.48
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 198,200
Weighted Average Remaining Contractual Life (in years) | 9 years 1 month 13 days
Weighted Average Exercise Price (in dollars per share) | $ 5.42
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 25,700
Weighted Average Remaining Contractual Life (in years) | 8 years 6 months 15 days
Weighted Average Exercise Price (in dollars per share) | $ 5.07
Exercise price, range four |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, lower limit (in dollars per share) | 5.49
Range of Exercise Prices, upper limit (in dollars per share) | $ 13.58
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 108,011
Weighted Average Remaining Contractual Life (in years) | 7 years 6 months 15 days
Weighted Average Exercise Price (in dollars per share) | $ 8.36
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 62,137
Weighted Average Remaining Contractual Life (in years) | 6 years 9 months 22 days
Weighted Average Exercise Price (in dollars per share) | $ 8.46
Exercise price, range five |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, lower limit (in dollars per share) | 13.59
Range of Exercise Prices, upper limit (in dollars per share) | $ 71.90
OPTIONS OUTSTANDING |
Number of Shares Outstanding (in shares) | shares | 102,000
Weighted Average Remaining Contractual Life (in years) | 7 years 4 months 10 days
Weighted Average Exercise Price (in dollars per share) | $ 24.56
OPTIONS EXERCISABLE |
Number of Shares Exercisable (in shares) | shares | 42,000
Weighted Average Remaining Contractual Life (in years) | 3 years 11 months 19 days
Weighted Average Exercise Price (in dollars per share) | $ 37.89

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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 remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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