CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 120,604	$ 108,783
Short-term investments	24,819	24,793
Accounts receivable, net	74,430	88,927
Inventories, net	71,970	65,444
Prepaid expenses and other current assets	26,437	28,795
Total current assets	318,260	316,742
Property and equipment:
Machinery and equipment	82,909	76,048
Furniture and fixtures	6,245	6,749
Leasehold improvements	20,636	20,304
Property and equipment at cost	109,790	103,101
Less: accumulated depreciation and amortization	(79,664)	(72,684)
Property and equipment, net	30,126	30,417
Operating lease right-of-use asset	18,068	0
Goodwill	71,210	67,274
Intangible assets, net	28,659	33,054
Service and sales demonstration inventory, net	39,416	39,563
Deferred income tax assets, net	14,732	14,719
Other long-term assets	2,983	4,475
Total assets	523,454	506,244
Current liabilities:
Accounts payable	16,177	20,093
Accrued liabilities	37,865	36,327
Income taxes payable	2,386	5,081
Lease liability	6,494	0
Total current liabilities	100,705	97,523
Unearned service revenues - less current portion	17,355	15,505
Lease liability - less current portion	13,483	0
Deferred income tax liabilities	2,614	736
Income taxes payable - less current portion	11,821	12,247
Other long-term liabilities	3,137	3,624
Total liabilities	149,115	129,635
Commitments and contingencies - See Note 16
Shareholders’ equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,751,573 and 18,676,059 issued, respectively; 17,339,062 and 17,253,011 outstanding, respectively	19	19
Additional paid-in capital	255,706	251,329
Retained earnings	168,773	175,353
Accumulated other comprehensive loss	(18,784)	(18,483)
Common stock in treasury, at cost; 1,412,511 and 1,423,048 shares, respectively	(31,375)	(31,609)
Total shareholders’ equity	374,339	376,609
Total liabilities and shareholders’ equity	523,454	506,244
Current portion of unearned service revenues
Current liabilities:
Current portion of unearned service revenues	35,082	32,878
Customer deposits	35,082	32,878
Customer deposits
Current liabilities:
Current portion of unearned service revenues	2,701	3,144
Customer deposits	$ 2,701	$ 3,144