CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and equivalents	$ 88,394	$ 84,282
Short term investments	26,859	25,511
Accounts receivable, net of allowances of $4,135 in 2020 and $2,524 in 2019	57,537	62,405
Inventories, net	13,093	19,819
Prepaid expenses	7,837	6,198
Contract assets	7,202	5,240
Other current assets	6,256	6,346
Total current assets	207,178	209,801
Property and equipment, net	11,835	11,454
Operating lease right-of-use assets	11,356	10,580
Goodwill	97,552	94,612
Intangible assets, net of accumulated amortization	27,196	36,209
Deferred income taxes	7,030	7,863
Contract assets - non-current	1,877	3,355
Other assets	11,179	8,668
Total assets	375,203	382,542
Current liabilities
Accounts payable	5,684	10,835
Deferred revenue	43,417	30,338
Accrued wages and payroll taxes	13,649	15,415
Short-term income taxes payable	2,618	7,410
Other accrued expenses	8,334	8,786
Deferred compensation	1,602	1,028
Total current liabilities	75,304	73,812
Long-term deferred revenue	11,730	15,259
Long-term lease liabilities	12,399	11,299
Other long-term liabilities	10,423	8,297
Long-term income taxes payable	6,095	6,958
Deferred income taxes	1,912	4,623
Total liabilities	117,863	120,248
Stockholders' equity
Preferred stock: 500 shares authorized, none issued and outstanding at December 31, 2020 and 2019
Common stock: $.001 par value per share, 75,000 shares authorized; 40,353 and 40,207 shares issued; 40,353 and 40,207 shares outstanding at December 31, 2020 and 2019, respectively	40	40
Additional paid-in capital	98,819	96,109
Treasury stock, at cost, 250 and 0 shares outstanding at December 31, 2020 and 2019, respectively	(5,030)
Retained earnings	173,731	179,440
Accumulated other comprehensive loss	(10,220)	(13,295)
Total stockholders' equity	257,340	262,294
Total liabilities and stockholders' equity	$ 375,203	$ 382,542