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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Operating activities:    
Consolidated net loss $ (1,361) $ (3,575)
Adjustments to reconcile consolidated net loss to net cash provided by (used for) operating activities:    
Depreciation and amortization 6,590 6,384
Stock-based compensation expense, net 1,272 171
Increase in other assets   (505)
Increase in other long-term liabilities 90  
Decrease in long-term deferred revenue (53) (76)
(Gain) loss on disposal of equipment (15) 4
Deferred income taxes 17 (51)
Credit gain on available-for-salesecurities (9) (10)
Provision (benefit) for doubtful accounts 8 (22)
Decrease in long-term income taxes payable (5) (10)
Change in current assets and liabilities, net (5,896) (3,894)
Net cash provided by (used for) operating activities 638 (1,584)
Investing activities:    
Additions to property, plant and equipment (10,164) (6,368)
Proceeds from sale of equipment 15 2
Increase in other assets (17) (18)
Net cash used for investing activities (10,166) (6,384)
Financing activities:    
Proceeds from issuance of Common Stock 2,510 455
Payment of contingent consideration obligations (175) (64)
Acquisition of noncontrolling interest   (372)
Net cash provided by financing activities 2,335 19
Effect of foreign exchange rates on cash (41) 35
Net decrease in cash and cash equivalents (7,234) (7,914)
Cash and cash equivalents at beginning of period 56,170 62,980
Cash and cash equivalents at end of period $ 48,936 $ 55,066