Stock-based Compensation - Summary of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number Of Options Outstanding, Option Granted	1,318,948
Number of Options Outstanding, End of the Period	1,066,800
Weighted Average Exercise Price, Option Granted	$ 1.46	$ 3.24
2010 Plan Activity [Member]
Shares Available For Grant Outstanding, Beginning of The Period	1,384,000	880,000
Shares Available For Grant Outstanding, Increase in pool		1,200,000
Shares Available For Grant Options Granted	(1,446,000)	(896,000)
Shares Available For Grant Options Exercised
Shares Available For Grant Options Forfeited, Canceled And Expired	138,000	200,000
Shares Available for Grant Options, Termination of the 2010 Plan	(76,000)
Shares Available for Grant Outstanding, End of the Period		1,384,000
Number of Options Outstanding, Beginning of the Period	3,390,000	3,017,000
Number Of Options Outstanding, Increase in pool
Number Of Options Outstanding, Option Granted	1,446,000	896,000
Number Of Options Outstanding, Options Exercised	(20,000)	(323,000)
Number Of Options Outstanding, Options Forfeited, Canceled And Expired	(645,000)	(200,000)
Number Of Options Outstanding, Termination of The 2010 Plan
Number of Options Outstanding, End of the Period	4,171,000	3,390,000
Number of Options Outstanding, Exercisable, End of the Period	2,348,000
Weighted Average Exercise Price, Options Outstanding, Beginning of the Period	$ 3.25	$ 2.52
Weighted Average Exercise Price, Option Granted	2.39	5.17
Weighted Average Exercise Price, Options Exercised	2.84	1.89
Weighted Average Exercise Price, Options Forfeited, Canceled and Expired	3.96	3.11
Weighted Average Exercise Price, Options Termination of the 2010 Plan
Weighted Average Exercise Price, Outstanding End of the Period	2.92	$ 3.25
Weighted Average Exercise Price, Exercisable, End of the Period	$ 2.82
2018 Incentive Plan Activity [Member]
Shares Available For Grant Outstanding, Beginning of The Period
Shares Available For Grant Outstanding, Approval of 2018 Incentive Plan	5,000,000
Shares Available For Grant Options Granted	(411,000)
Shares Available For Grant Options Exercised
Shares Available For Grant Options Forfeited, Canceled And Expired	50,000
Shares Available for Grant Outstanding, End of the Period	4,639,000
Number of Options Outstanding, Beginning of the Period
Number Of Options Outstanding, Approval of 2018 Incentive Plan
Number Of Options Outstanding, Option Granted	411,000
Number Of Options Outstanding, Options Exercised
Number Of Options Outstanding, Options Forfeited, Canceled And Expired	(50,000)
Number of Options Outstanding, End of the Period	361,000
Number of Options Outstanding, Exercisable, End of the Period
Weighted Average Exercise Price, Options Outstanding, Beginning of the Period
Weighted Average Exercise Price, Approval of 2018 Incentive Plan
Weighted Average Exercise Price, Option Granted	$ 2.21
Weighted Average Exercise Price, Options Exercised
Weighted Average Exercise Price, Options Forfeited, Canceled and Expired	1.95
Weighted Average Exercise Price, Outstanding End of the Period	2.21
Weighted Average Exercise Price, Exercisable, End of the Period