Equity Compensation Plans (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total non-cash stock-based compensation	$ 962	$ 6,733	$ 1,212	$ 6,806
Cost of revenues [Member]
Total non-cash stock-based compensation	45	453	80	465
Marketing and sales [Member]
Total non-cash stock-based compensation	88	2,883	148	2,883
General and administrative [Member]
Total non-cash stock-based compensation	507	2,881	659	2,942
Research and development [Member]
Total non-cash stock-based compensation	$ 332	$ 516	$ 325	$ 516