Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 23,492	$ 20,342	$ 18,843
Cost of revenues	17,680	17,783	12,913
Gross profit	5,812	2,559	5,930
Operating expenses:
Selling, general and administrative expense	20,063	18,629	17,506
Depreciation and amortization	1,544	1,549	1,366
Research and development	139	155	222
Provision for (credit to) bad debt	131	13	(16)
Impairment of goodwill		4,347	3,152
Other operating (income) expenses	(20)		5
Total operating expenses	21,857	24,693	22,235
Continuing loss from operations	(16,045)	(22,134)	(16,305)
Other income (expense)	567	(316)	310
Interest expense	(61)	(216)	(201)
Loss from continuing operations before income taxes and equity in net loss of affiliate	(15,539)	(22,666)	(16,196)
Net loss of affiliate	(1,043)
Loss from continuing operations before taxes	(16,582)	(22,666)	(16,196)
Income tax benefit	(2,956)	(1,342)	(2,251)
Loss from continuing operations, net of income taxes	(13,626)	(21,324)	(13,945)
Discontinued operations (Note 2)
Income from operations of discontinued power and electromechanical components businesses (including gain on disposal of $14,100)	12,908	5,135	2,001
Income tax expense	411	1,136	645
Income from discontinued operations, net of income taxes	12,497	3,999	1,356
Net loss	$ (1,129)	$ (17,325)	$ (12,589)
Basic and diluted weighted average number of shares outstanding (in shares)	28,654,500	28,517,339	22,397,865
Loss from continuing operations per common share - basic and diluted (in dollars per share)	$ (0.48)	$ (0.75)	$ (0.62)
Earnings from discontinued operations per common share - basic and diluted (in dollars per share)	0.44	0.14	0.06
Loss per common share - basic and diluted (in dollars per share)	$ (0.04)	$ (0.61)	$ (0.56)