STOCKHOLDERS' EQUITY Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Payment Arrangement, Expense	$ 2,726	$ 2,005	$ 4,835	$ 3,743
Cost of Products Revenues [Member]
Share-based Payment Arrangement, Expense	118	90	220	141
Cost of Services Revenues [Member]
Share-based Payment Arrangement, Expense	158	77	256	95
Research and Development Expense [Member]
Share-based Payment Arrangement, Expense	359	262	653	457
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expense	581	450	1,022	744
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense	$ 1,510	$ 1,126	$ 2,684	$ 2,306