COMPONENTS OF THE COMPANY'S CONSOLIDATED BALANCE SHEETS Components of Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable
Accounts receivable trade	$ 61,036	$ 54,055
Accrued ship and debit	(33,475)	(40,118)
Allowance for stock rotation and rebate	(2,524)	(2,159)
Allowance for doubtful accounts	(763)	(706)
Total	24,274	11,072
Inventory, Net [Abstract]
Raw materials	39,058	41,138
Work-in-process	25,982	15,612
Finished goods	25,340	24,107
Total	90,380	80,857
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid income tax	5,615	3,081
Prepaid legal fees	16	181
Prepaid maintenance agreements	819	2,047
Advance to suppliers	3,579	2,157
Interest receivable	1,279	595
Other	4,289	3,854
Total	$ 15,597	$ 11,915