CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 117,594	$ 106,169
Short-term investments	21,970	42,942
Accounts receivable, net	58,805	61,364
Inventories, net	57,866	51,886
Prepaid expenses and other current assets	22,989	16,304
Total current assets	279,224	278,665
Property and equipment:
Machinery and equipment	62,937	57,063
Furniture and fixtures	7,156	6,099
Leasehold improvements	19,400	18,778
Property and equipment, at cost	89,493	81,940
Less: accumulated depreciation and amortization	(57,138)	(50,262)
Property and equipment, net	32,355	31,678
Goodwill	51,417	46,744
Intangible assets, net	23,313	22,279
Service and sales demonstration inventory, net	35,259	29,136
Deferred income tax assets, net	14,442	14,307
Other long-term assets	1,058	905
Total assets	437,068	423,714
Current liabilities:
Accounts payable	12,651	11,126
Accrued liabilities	25,619	24,572
Income taxes payable	0	618
Current portion of unearned service revenues	29,358	27,422
Customer deposits	2,883	2,872
Total current liabilities	70,511	66,610
Unearned service revenues - less current portion	12,832	13,813
Deferred income tax liabilities	1,570	1,409
Other long-term liabilities	2,664	2,225
Total liabilities	87,577	84,057
Commitments and contingencies - See Note 16
Shareholders’ equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,194,509 and 18,170,267 issued, respectively; 16,708,033 and 16,680,791 outstanding, respectively	18	18
Additional paid-in capital	216,511	212,602
Retained earnings	178,053	183,436
Accumulated other comprehensive loss	(13,262)	(24,561)
Common stock in treasury, at cost; 1,486,476 and 1,489,476 shares, respectively	(31,829)	(31,838)
Total shareholders’ equity	349,491	339,657
Total liabilities and shareholders’ equity	$ 437,068	$ 423,714