Investment - Schedule of Equity Method Investments (Details) - RadQual, LLC - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Current assets	$ 598,000		$ 598,000		$ 501,000
Noncurrent assets	12,000		12,000		12,000
Current liabilities	397,000		397,000		293,000
Noncurrent liabilities	0		0		$ 0
Revenue	797,000	$ 819,000	1,657,000	$ 1,622,000
Gross profit	209,000	231,000	472,000	458,000
Net income	$ 66,000	$ 101,000	$ 185,000	$ 185,000