Revision of Prior Period Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Sales:
Sales	$ 13,780	$ 16,883	$ 16,858	$ 33,741	$ 47,521	$ 61,793	$ 79,061
Cost of sales:
Total cost of sales	9,556	12,400	12,827	25,227	34,783	44,626	61,035
Gross profit	4,224	4,483	4,031	8,514	12,738	17,167	18,026
Operating loss	(393)	(143)	(402)	(545)	(938)	(1,424)	(826)
Net loss	$ (210)	$ (732)	$ (540)	$ (1,272)	$ (1,482)	$ (1,446)	$ (371)
Net loss per share – basic	$ (0.05)	$ (0.18)	$ (0.14)	$ (0.32)	$ (0.37)	$ (0.36)	$ (0.09)
Net loss per share – diluted	$ (0.05)	$ (0.18)	$ (0.14)	$ (0.32)	$ (0.37)	$ (0.36)	$ (0.09)
Product
Sales:
Sales	$ 10,399	$ 13,146	$ 13,559	$ 26,705	$ 37,104	$ 47,989	$ 66,017
Cost of sales:
Total cost of sales	8,600	11,033	11,604	22,637	31,237	39,907	55,836
Service
Sales:
Sales	3,381	3,737	3,299	7,036	10,417	13,804	13,044
Cost of sales:
Total cost of sales	956	1,367	1,223	2,590	3,546	$ 4,719	$ 5,199
As Reported
Sales:
Sales	13,532	16,095	16,572	32,667	46,199
Cost of sales:
Total cost of sales	9,308	11,612	12,541	24,153	33,461
Gross profit	4,224	4,483	4,031	8,514	12,738
Operating loss	(393)	(143)	(402)	(545)	(938)
Net loss	$ (210)	$ (732)	$ (540)	$ (1,272)	$ (1,482)
Net loss per share – basic	$ (0.05)	$ (0.18)	$ (0.14)	$ (0.32)	$ (0.37)
Net loss per share – diluted	$ (0.05)	$ (0.18)	$ (0.14)	$ (0.32)	$ (0.37)
As Reported | Product
Sales:
Sales	$ 10,294	$ 12,296	$ 13,222	$ 25,518	$ 35,812
Cost of sales:
Total cost of sales	8,361	10,245	11,318	21,563	29,924
As Reported | Service
Sales:
Sales	3,238	3,799	3,350	7,149	10,387
Cost of sales:
Total cost of sales	947	1,367	1,223	2,590	3,537
Restatement Adjustment
Sales:
Sales	248	788	286	1,074	1,322
Cost of sales:
Total cost of sales	248	788	286	1,074	1,322
Restatement Adjustment | Product
Sales:
Sales	105	850	337	1,187	1,292
Cost of sales:
Total cost of sales	239	788	286	1,074	1,313
Restatement Adjustment | Service
Sales:
Sales	143	$ (62)	$ (51)	$ (113)	30
Cost of sales:
Total cost of sales	$ 9				$ 9