Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (3,599)	$ (4,544)
Loss from discontinued operations		1,713
Loss from continuing operations	(3,599)	(2,831)
Adjustments to reconcile net loss from continuing operations to net cash provided by operating activities:
Depreciation and amortization	3,311	2,448
Equity in loss of partnerships	90	206
Stock-based compensation	2,044	1,514
Change in fair value of contingent consideration	253
Provision for doubtful accounts	40	(501)
Loss on disposal of assets	174
Impairment loss		3,765
Changes in operating assets and liabilities:
Accounts receivable	1,223	3,394
Inventories	(2,139)	110
Contract assets	(355)	(2,889)
Other assets	593	(165)
Accounts payable	(2,354)	(1,773)
Accrued expenses	1,878	(1,372)
Other liabilities	(1,114)	(123)
Net cash provided by operating activities of continuing operations	45	1,783
Net cash provided by (used in) operating activities of discontinued operations	3	(24)
Net cash provided by operating activities	48	1,759
Cash flows from investing activities:
Purchases of machinery and equipment	(2,562)	(3,787)
Payments for acquisition of a business	(7,128)
Payments for acquistion of intangible assets	(489)	(696)
Purchase of investment securities	(6,110)	(40,590)
Proceeds from sale of investment securities		38,015
Proceeds from maturities of investment securities	23,998	6,425
Investment in partnerships		(296)
Net cash provided by (used in) investing activities of continuing operations	7,709	(929)
Net cash used in investing activities of discontinued operations		(16)
Net cash provided by (used in) investing activities	7,709	(945)
Cash flows from financing activities:
Payment of financing leases	(79)	(82)
Exercise of stock options and employee stock purchase plan shares	173	263
Withholding of common stock upon vesting of restricted stock units	(246)	(304)
Net cash used in financing activities	(152)	(123)
Effect of exchange rate changes on cash	(39)	(50)
Net increase in cash	7,566	641
Cash, cash equivalents and restricted cash, beginning of period	9,162	8,047
Cash, cash equivalents and restricted cash, end of period	16,728	8,688
Non-cash investing and financing:
Acquisition of machinery and equipment in accounts payable	75	305
Acquisition of a business through liabilities incurred	3,705
Acquisition of a business through issuance of common stock	982
Investment in partnership	$ 442
Fitting software intangible assets through liabilities incurred and exchange of investment in partnership		$ 3,093