CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 129,841	$ 106,169
Short-term investments	10,970	42,942
Accounts receivable, net	60,449	61,364
Inventories, net	59,044	51,886
Prepaid expenses and other current assets	20,919	16,304
Total current assets	281,223	278,665
Property and equipment:
Machinery and equipment	66,049	57,063
Furniture and fixtures	6,863	6,099
Leasehold improvements	19,588	18,778
Property and equipment, at cost	92,500	81,940
Less: accumulated depreciation and amortization	(60,189)	(50,262)
Property and equipment, net	32,311	31,678
Goodwill	52,567	46,744
Intangible assets, net	22,983	22,279
Service and sales demonstration inventory, net	35,250	29,136
Deferred income tax assets, net	14,498	14,307
Other long-term assets	1,049	905
Total assets	439,881	423,714
Current liabilities:
Accounts payable	11,964	11,126
Accrued liabilities	22,507	24,572
Income taxes payable	0	618
Current portion of unearned service revenues	29,080	27,422
Customer deposits	3,065	2,872
Total current liabilities	66,616	66,610
Unearned service revenues - less current portion	12,665	13,813
Deferred income tax liabilities	1,683	1,409
Other long-term liabilities	2,191	2,225
Total liabilities	83,155	84,057
Commitments and contingencies - See Note 16
Shareholders’ equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,197,628 and 18,170,267 issued, respectively; 16,711,152 and 16,680,791 outstanding, respectively	18	18
Additional paid-in capital	218,242	212,602
Retained earnings	179,682	183,436
Accumulated other comprehensive loss	(9,387)	(24,561)
Common stock in treasury, at cost; 1,486,476 and 1,489,476 shares, respectively	(31,829)	(31,838)
Total shareholders’ equity	356,726	339,657
Total liabilities and shareholders’ equity	$ 439,881	$ 423,714