Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Total revenues	$ 96,789,000	$ 83,275,000	$ 86,461,000
Cost of revenues	67,879,000	55,406,000	54,200,000
Gross profit	28,910,000	27,869,000	32,261,000
Operating expenses:
Selling, general and administrative	36,341,000	33,921,000	34,239,000
Depreciation and amortization	2,152,000	2,163,000	2,366,000
Research and development	2,802,000	2,525,000	2,016,000
Provision (credit) for bad debt	33,000	(13,000)	93,000
Impairment of goodwill and other intangible assets	4,347,000	3,155,000
Other operating expenses	13,000	47,000	57,000
Total operating expenses	45,688,000	41,798,000	38,771,000
Loss from operations	(16,778,000)	(13,929,000)	(6,510,000)
Other (expense) income	(251,000)	234,000	(251,000)
Interest expense	(502,000)	(500,000)	(467,000)
Loss before taxes	(17,531,000)	(14,195,000)	(7,228,000)
Income tax (benefit) expense	(206,000)	(1,606,000)	38,000
Net loss	$ (17,325,000)	$ (12,589,000)	$ (7,266,000)
Basic and diluted weighted average number of shares outstanding (in shares)	28,517,339	22,397,865	20,897,812
Basic and diluted loss per common share (in dollars per share)	$ (0.61)	$ (0.56)	$ (0.35)