CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 173,700	$ 133,634
Short-term investments	0	24,870
Accounts receivable, net	48,113	76,162
Inventories, net	53,425	58,554
Prepaid expenses and other current assets	20,795	28,996
Total current assets	296,033	322,216
Non-current assets:
Property, plant and equipment, net	22,507	26,954
Operating lease right-of-use asset	14,684	18,418
Goodwill	49,184	49,704
Intangible assets, net	12,744	14,471
Service and sales demonstration inventory, net	34,130	33,349
Deferred income tax assets, net	21,153	18,766
Other long-term assets	2,872	2,964
Total assets	453,307	486,842
Current liabilities:
Accounts payable	12,067	13,718
Accrued liabilities	42,975	38,072
Income taxes payable	1,258	5,182
Lease liability	4,904	6,674
Total current liabilities	101,135	105,965
Unearned service revenues - less current portion	19,582	20,578
Lease liability - less current portion	11,651	13,698
Deferred income tax liabilities	285	357
Income taxes payable - less current portion	12,058	13,177
Other long-term liabilities	35	1,075
Total liabilities	144,746	154,850
Commitments and contingencies - See Note 13
Shareholders’ equity:
Common Stock, Value, Issued	19	19
Additional paid-in capital	273,325	267,868
Retained earnings	89,124	112,879
Accumulated other comprehensive loss	(22,865)	(17,399)
Treasury Stock, Value	(31,042)	(31,375)
Total shareholders’ equity	308,561	331,992
Total liabilities and shareholders’ equity	453,307	486,842
Current portion of unearned service revenues
Current liabilities:
Current portion of unearned service revenues	36,480	39,211
Customer deposits	36,480	39,211
Customer deposits
Current liabilities:
Current portion of unearned service revenues	3,451	3,108
Customer deposits	$ 3,451	$ 3,108