Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 4,679	$ 737
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,146	1,659
Stock-based compensation	1,025	634
Loss on sale of discontinued operations		164
Change in allowance for doubtful accounts	368	65
Equity in loss of partnerships	300	281
Changes in operating assets and liabilities:
Accounts receivable	(4,915)	249
Inventories	(4,838)	(1,658)
Contract assets	(3,345)	(1,335)
Other assets	(571)	(658)
Accounts payable	2,520	1,712
Accrued expenses	65	1,228
Other liabilities	(146)	31
Net cash provided by (used in) operating activities	(2,712)	3,109
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,496)	(984)
Purchase of investment securities	(48,842)
Sale of investment securities	3,800
Investment in partnerships	(843)	(730)
Net cash used in investing activities	(49,381)	(1,714)
Cash flows from financing activities:
Proceeds from long-term debt	14,195	10,906
Repayments of long-term debt	(25,539)	(13,110)
Proceeds from issuance of common stock, net of costs	88,967
Payments for repurchase of common stock and related costs	(25,907)
Proceeds from employee stock purchases and exercise of stock options	584	164
Net cash provided by (used in) financing activities	52,300	(2,040)
Effect of exchange rate changes on cash	(26)	364
Net increase (decrease) in cash	181	(281)
Cash, cash equivalents and restricted cash, beginning of period	1,017	1,262
Cash, cash equivalents and restricted cash, end of period	1,198	$ 981
Noncash investing and financing:
Investment in partnerships through liability incurred	86
Acquisition of property, plant and equipment in accounts payable	$ 2,098