CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 105,858	$ 106,169
Short-term investments	42,912	42,942
Accounts receivable, net	60,633	61,364
Inventories, net	52,537	51,886
Prepaid expenses and other current assets	17,829	16,304
Total current assets	279,769	278,665
Property and equipment:
Machinery and equipment	58,566	57,063
Furniture and fixtures	6,868	6,099
Leasehold improvements	19,099	18,778
Property and equipment, at cost	84,533	81,940
Less: accumulated depreciation and amortization	(53,108)	(50,262)
Property and equipment, net	31,425	31,678
Goodwill	47,433	46,744
Intangible assets, net	21,386	22,279
Service and sales demonstration inventory, net	31,935	29,136
Deferred income tax assets, net	14,478	14,307
Other long-term assets	750	905
Total assets	427,176	423,714
Current liabilities:
Accounts payable	11,953	11,126
Accrued liabilities	21,920	24,572
Income taxes payable	0	618
Current portion of unearned service revenues	28,865	27,422
Customer deposits	2,799	2,872
Total current liabilities	65,537	66,610
Unearned service revenues - less current portion	13,390	13,813
Deferred income tax liabilities	1,445	1,409
Other long-term liabilities	2,622	2,225
Total liabilities	82,994	84,057
Commitments and contingencies - See Note 16
Shareholders’ equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,178,495 and 18,170,267 issued; 16,692,019 and 16,680,791 outstanding, respectively	18	18
Additional paid-in capital	214,715	212,602
Retained earnings	181,679	183,436
Accumulated other comprehensive loss	(20,402)	(24,561)
Common stock in treasury, at cost; 1,486,476 and 1,489,476 shares, respectively	(31,828)	(31,838)
Total shareholders’ equity	344,182	339,657
Total liabilities and shareholders’ equity	$ 427,176	$ 423,714