Shareholders' Equity (Details) | 9 Months Ended |
Sep. 30, 2016USD ($)Plan$ / sharesshares | Dec. 31, 2015USD ($)$ / sharesshares | Sep. 30, 2015USD ($)$ / shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Share-based compensation expense | $ | $ 440,000 | | $ 951,000 |
Mr. Lewis C. Pell [Member] | | | |
Stock Warrants-Related Party [Abstract] | | | |
Warrants issued to purchase common stock (in shares) | shares | 376,123 | | |
Warrants exercise price (in dollars per share) | $ 9.31 | | |
Stock Options [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Unrecognized share-based compensation expense | $ | $ 371,000 | | |
Unrecognized compensation expense, weighted average period of recognition | 2 years 3 months | | |
Weighted-average assumptions used to value the options granted [Abstract] | | | |
Expected life in years | 3 years 10 months 24 days | | 3 years 10 months 2 days |
Risk-free interest rate | 0.98% | | 1.11% |
Expected volatility | 64.32% | | 63.94% |
Expected dividend yield | 0.00% | | 0.00% |
Weighted-average grant date fair value (in dollars per share) | $ 0.49 | | $ 0.79 |
Stock options, number of shares [Roll Forward] | | | |
Outstanding, beginning of period (in shares) | shares | 2,573,640 | | |
Options granted (in shares) | shares | 692,400 | | |
Options exercised (in shares) | shares | 0 | | |
Options surrendered (in shares) | shares | (1,566,135) | | |
Outstanding, end of period (in shares) | shares | 1,699,905 | 2,573,640 | |
Exercisable, end of period (in shares) | shares | 818,333 | | |
Stock options, weighted average exercise price [Roll Forward] | | | |
Outstanding, beginning of period (in dollars per share) | $ 4.44 | | |
Options granted (in dollars per share) | 1.05 | | |
Options exercised (in dollars per share) | 0 | | |
Options surrendered (in dollars per share) | 3.90 | | |
Outstanding, end of period (in dollars per share) | 3.54 | $ 4.44 | |
Exercisable, end of period (in dollars per share) | $ 6.03 | | |
Stock options, additional disclosures [Abstract] | | | |
Outstanding, weighted average remaining life in years | 6 years 9 months 14 days | 4 years 7 months 20 days | |
Options exercisable, Weighted average remaining life in years | 3 years 11 months 12 days | | |
Outstanding, aggregate intrinsic value | $ | $ 578,213 | $ 0 | |
Exercisable, aggregate intrinsic value | $ | 16,062 | | |
Fair value of stock options vested | $ | $ 268,000 | | $ 600,000 |
Stock Options [Member] | Executive Employees and Directors [Member] | | | |
Weighted-average assumptions used to value the options granted [Abstract] | | | |
Forfeiture rate | 15.00% | | |
Stock Options [Member] | Non-Executive Employees [Member] | | | |
Weighted-average assumptions used to value the options granted [Abstract] | | | |
Forfeiture rate | 20.00% | | |
Restricted Stock [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Unrecognized share-based compensation expense | $ | $ 907,000 | | |
Unrecognized compensation expense, weighted average period of recognition | 1 year 6 months 14 days | | |
Restricted shares and warrants, number of shares [Roll Forward] | | | |
Balance, beginning of period (in shares) | shares | 686,910 | | |
Shares granted (in shares) | shares | 837,858 | | |
Shares vested (in shares) | shares | (323,613) | | |
Shares forfeited (in shares) | shares | (301,822) | | |
Balance, end of period (in shares) | shares | 899,333 | 686,910 | |
Restricted shares, weighted average grant date fair value [Roll Forward] | | | |
Balance, beginning of period (in dollars per share) | $ 2.41 | | |
Shares granted (in dollars per share) | 1.06 | | |
Shares vested (in dollars per share) | 2.19 | | |
Shares forfeited (in dollars per share) | 2.48 | | |
Balance, end of period (in dollars per share) | $ 1.21 | $ 2.41 | |
Restricted shares and warrants, additional disclosures [Abstract] | | | |
Weighted average remaining life in years, Balance | 1 year 6 months 14 days | 1 year 7 months 2 days | |
Aggregate intrinsic value, Balance | $ | $ 1,636,786 | $ 886,114 | |
Performance Award [Member] | | | |
Long-Term Incentive Plan and Awards [Abstract] | | | |
First stock price target of common stock (in dollars per share) | $ 7.57 | | |
Second stock price target of common stock (in dollars per share) | 10.32 | | |
Third stock price target of common stock (in dollars per share) | $ 13.76 | | |
Number of consecutive trading days | 45 days | | |
Award requisite service period | 2 years 4 months 24 days | | |
Recorded liability | $ | $ 10,000 | | |
Recorded income | $ | $ 57,000 | | |
2015 Plan [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Number of active plans for share-based compensation grants | Plan | 1 | | |
Number of shares reserved for share-based grants (in shares) | shares | 2,500,000 | | |
Shares remain available for grant (in shares) | shares | 1,475,870 | | |
2015 Plan [Member] | Stock Options [Member] | Maximum [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Term of share-based payment award | 7 years | | |
Vesting period | 3 years | | |