Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Revenues:
Total revenues	$ 23,140	$ 22,872	[1]	$ 43,802	$ 39,509	[1]
Cost of revenues	13,983	14,599		26,609	25,015
Gross profit	9,157	8,273		17,193	14,494
Operating expenses:
Selling, general and administrative	9,009	7,894		18,247	16,579
Depreciation and amortization	616	609		1,225	1,595
Research and development	527	531		1,032	974
Provision for bad debt	42	54		49	137
Other operating expenses	0	0		0	2
Total operating expenses	10,194	9,088		20,553	19,287
Loss from operations	(1,037)	(815)		(3,360)	(4,793)	[2]
Other income (expense)	(195)	293		(271)	189
Interest expense	(121)	(96)		(245)	(209)
Loss before taxes	(1,353)	(618)		(3,876)	(4,813)
Income tax expense (benefit)	128	(114)		273	(233)
Net loss	$ (1,481)	$ (504)		$ (4,149)	$ (4,580)
Basic and diluted weighted average common and common equivalent shares outstanding (in shares)	20,889,052	20,786,081		20,883,800	20,780,074
Basic and diluted (loss) per common share (in dollars per share)	$ (0.07)	$ (0.02)		$ (0.20)	$ (0.22)

[1] See note 1, Nature of operations - Revisions, for explanation of change to 2015 revenue amounts.

[2] For the three and six months ended June 30, 2015, $31 thousand and $62 thousand, respectively, of compensation expense included in Selling, General and Administrative expense was reclassified from the Power and Electromechanical segment to the Energy segment to conform with the 2016 presentation.