CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 119,083	$ 108,783
Short-term investments	24,868	24,793
Accounts receivable, net	64,708	88,927
Inventories, net	69,779	65,444
Prepaid expenses and other current assets	28,084	28,795
Total current assets	306,522	316,742
Property and equipment:
Machinery and equipment	82,578	76,048
Furniture and fixtures	6,172	6,749
Leasehold improvements	21,066	20,304
Property and equipment at cost	109,816	103,101
Less: accumulated depreciation and amortization	(81,411)	(72,684)
Property and equipment, net	28,405	30,417
Operating lease right-of-use asset	18,672	0
Goodwill	69,712	67,274
Intangible assets, net	27,530	33,054
Service and sales demonstration inventory, net	39,509	39,563
Deferred income tax assets, net	14,693	14,719
Other long-term assets	2,987	4,475
Total assets	508,030	506,244
Current liabilities:
Accounts payable	11,705	20,093
Accrued liabilities	35,255	36,327
Income taxes payable	1,081	5,081
Lease liability	6,615	0
Total current liabilities	92,348	97,523
Unearned service revenues - less current portion	18,171	15,505
Lease liability - less current portion	13,922	0
Deferred income tax liabilities	2,466	736
Income taxes payable - less current portion	12,567	12,247
Other long-term liabilities	1,031	3,624
Total liabilities	140,505	129,635
Commitments and contingencies - See Note 15
Shareholders’ equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,816,598 and 18,676,059 issued, respectively; 17,404,087 and 17,253,011 outstanding, respectively	19	19
Additional paid-in capital	260,737	251,329
Retained earnings	162,574	175,353
Accumulated other comprehensive loss	(24,430)	(18,483)
Common stock in treasury, at cost; 1,412,511 and 1,423,048 shares, respectively	(31,375)	(31,609)
Total shareholders’ equity	367,525	376,609
Total liabilities and shareholders’ equity	508,030	506,244
Current portion of unearned service revenues
Current liabilities:
Current portion of unearned service revenues	35,273	32,878
Customer deposits	35,273	32,878
Customer deposits
Current liabilities:
Current portion of unearned service revenues	2,419	3,144
Customer deposits	$ 2,419	$ 3,144