CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 121,989	$ 185,633
Accounts receivable, net	78,523	64,616
Inventories, net	53,145	47,391
Prepaid expenses and other current assets	19,793	26,295
Total current assets	273,450	323,935
Non-current assets:
Property, plant and equipment, net	22,194	23,091
Operating lease right-of-use asset	22,543	26,107
Goodwill	82,096	57,541
Intangible assets, net	25,616	13,301
Service and sales demonstration inventory, net	30,554	31,831
Deferred income tax assets, net	21,277	47,450
Other long-term assets	2,010	2,336
Total assets	479,740	525,592
Current liabilities:
Accounts payable	14,199	14,121
Accrued liabilities	28,208	42,593
Income taxes payable	4,499	3,442
Current portion of unearned service revenues	40,838	39,149
Customer deposits	5,399	2,807
Lease liability	5,738	5,835
Total current liabilities	98,881	107,947
Unearned service revenues - less current portion	22,350	21,757
Lease liability - less current portion	18,648	22,131
Deferred income tax liabilities	1,058	787
Income taxes payable - less current portion	11,297	11,583
Other long-term liabilities	1,047	1,084
Total liabilities	153,281	165,289
Commitments and contingencies - See Note 12
Shareholders’ equity:
Preferred stock - par value $0.01, 10,000,000 shares authorized; none issued	0	0
Common stock - par value $0.001, 50,000,000 shares authorized; 19,588,003 and 19,384,350 issued; 18,205,636 and 17,990,707 outstanding, respectively	20	19
Additional paid-in capital	301,061	287,979
Retained earnings	73,544	113,508
Accumulated other comprehensive loss	(17,374)	(10,160)
Common stock in treasury, at cost - 1,382,367 and 1,393,643 shares held, respectively	(30,792)	(31,043)
Total shareholders’ equity	326,459	360,303
Total liabilities and shareholders’ equity	$ 479,740	$ 525,592