STOCKHOLDERS' EQUITY Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Expense	$ 3,297	$ 2,045	$ 8,132	$ 5,788
Cost of Products Revenues [Member]
Share-based Payment Arrangement, Expense	150	103	370	244
Cost of Services Revenues [Member]
Share-based Payment Arrangement, Expense	283	82	539	177
Research and Development Expense [Member]
Share-based Payment Arrangement, Expense	546	305	1,199	762
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expense	739	532	1,761	1,276
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense	$ 1,579	$ 1,023	$ 4,263	$ 3,329