CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SALES
Sales	$ 345,765	$ 337,814	$ 303,768
COST OF SALES
Total cost of sales	170,002	153,887	143,921
GROSS PROFIT	175,763	183,927	159,847
OPERATING EXPENSES
Selling, general and administrative	146,657	136,234	131,827
Research and development	49,415	48,761	42,896
Restructuring costs	4,614	7,368	15,806
Total operating expenses	200,686	192,363	190,529
LOSS FROM OPERATIONS	(24,923)	(8,436)	(30,682)
OTHER (INCOME) EXPENSE
Other (income) expense, net	(3,236)	70	431
Interest (income) expense	(36)	55	(340)
LOSS BEFORE INCOME TAX EXPENSE (BENEFIT)	(21,651)	(8,561)	(30,773)
INCOME TAX EXPENSE (BENEFIT)	5,105	31,403	(31,402)
NET (LOSS) INCOME	$ (26,756)	$ (39,964)	$ 629
NET (LOSS) INCOME PER SHARE - BASIC (in dollars per share)	$ (1.46)	$ (2.20)	$ 0.04
NET (LOSS) INCOME PER SHARE - DILUTED (in dollars per share)	$ (1.46)	$ (2.20)	$ 0.04
Weighted average shares - Basic (in shares)	18,318,191	18,187,946	17,769,958
Weighted average shares - Diluted (in shares)	18,318,191	18,187,946	17,926,324
Product
SALES
Sales	$ 265,280	$ 251,103	$ 218,587
COST OF SALES
Total cost of sales	123,836	109,024	98,864
Service
SALES
Sales	80,485	86,711	85,181
COST OF SALES
Total cost of sales	$ 46,166	$ 44,863	$ 45,057