Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 34,596	$ 26,422
Marketable securities	8,319	25,712
Accounts receivable, net of allowance for doubtful accounts of $2,852 and $3,477 as of December 31, 2017 & December 31, 2016, respectively	28,316	31,152
Inventories	22,732	20,745
Prepaid expenses and other current assets	3,816	4,801
Total current assets	97,779	108,832
Property and equipment, less accumulated depreciation of $51,099 and $45,766 as of December 31, 2017 & December 31, 2016, respectively	43,521	36,586
Intangible assets, less accumulated amortization of $20,656 and $16,344 as of December 31, 2017 & December 31, 2016, respectively	15,120	17,838
Goodwill	33,872	31,343
Other non-current assets	5,927	5,134
Non-current deferred income tax asset	20	24
Total assets	196,239	199,757
Current liabilities:
Accounts payable	15,736	8,436
Accrued compensation and employee-related expenses	5,358	4,766
Accrued other	9,210	8,317
Accrued product warranty costs	2,074	2,280
Deferred revenue	6,919	6,661
Current portion of long-term debt	2,482	7,900
Liability for Uncertain Tax Positions, Current	1,570	1,283
Total current liabilities	43,349	39,643
Non-current deferred income tax liability	2,634	3,133
Other long-term liabilities	19	326
Long-term debt, excluding current portion	44,572	50,153
Total liabilities	90,574	93,255
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; none issued	0	0
Common stock, $0.01 par value. Authorized 30,000,000 shares, 18,787,816 and 18,420,914 shares issued at December 31, 2017 and December 31, 2016, respectively; and 17,128,825 and 16,761,923 shares outstanding at December 31, 2017 and December 31, 2016, respectively	188	184
Additional paid-in capital	134,361	129,660
(Accumulated deficit) retained earnings	(4,417)	6,617
Accumulated other comprehensive loss	(11,317)	(16,809)
Total Stockholders equity before treasury stock adjustment	118,815	119,652
Less: treasury stock at cost, common stock, 1,658,991 shares as of December 31, 2017 and December 31, 2016, respectively	(13,150)	(13,150)
Total stockholders’ equity	105,665	106,502
Total liabilities and stockholders’ equity	$ 196,239	$ 199,757