Revenue Recognition (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Services revenues	$ 5,435,000	$ 7,868,000	$ 10,074,000	$ 14,894,000
Products revenues	407,000	377,000	908,000	770,000
Total Net Sales	5,842,000	8,245,000	10,982,000	15,664,000
Products and services transferred over time
Services revenues	4,144,000	7,868,000	7,699,000	14,894,000
Products revenues	0	0	0	0
Total Net Sales	4,144,000	7,868,000	7,699,000	14,894,000
Products and services transferred at a point in time
Services revenues	1,291,000	0	2,375,000	0
Products revenues	407,000	377,000	908,000	770,000
Total Net Sales	$ 1,698,000	$ 377,000	$ 3,283,000	$ 770,000