Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended					6 Months Ended	9 Months Ended	12 Months Ended	36 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Mar. 31, 2019	Jun. 30, 2019	Jun. 30, 2019
Revenue	$ 43,359	$ 38,508	$ 37,704	$ 34,486	$ 33,768	$ 68,254	$ 105,958	$ 144,466
Costs of sales	31,943	28,769	27,751	25,051	22,710	47,761	75,512	104,281
Gross profit	11,416	9,739	9,953	9,435	11,058	20,493	30,446	40,185
Operating expenses:
Selling, general and administrative	18,107	15,490	11,156	10,931	9,450	20,381	31,537	47,027
Investigation and restatement expenses	3,565	2,451	1,408	7,188	4,526	11,714	13,122	15,573
Integration and acquisition costs	0	211	24	181	922	1,103	1,127	1,338
Depreciation and amortization	1,022	1,071	1,083	1,143	1,133	2,276	3,359	4,430
Total operating expenses	22,694	19,223	13,671	19,443	16,031	35,474	49,145	68,368
Operating loss	(11,278)	(9,484)	(3,718)	(10,008)	(4,973)	(14,981)	(18,699)	(28,183)
Other income (expense):
Interest income	294	310	348	408	489	897	1,245	1,555
Interest expense	(465)	(474)	(913)	(819)	(786)	(1,605)	(2,518)	(2,992)
Total other income (expense), net	(171)	(164)	(565)	(411)	(297)	(708)	(1,273)	(1,437)
Loss before income taxes	(11,449)	(9,648)	(4,283)	(10,419)	(5,270)	(15,689)	(19,972)	(29,620)
Provision for income taxes	(59)	(202)	(23)	(19)	(18)	(37)	(60)	(262)
Net loss	(11,508)	(9,850)	(4,306)	(10,438)	(5,288)	(15,726)	(20,032)	(29,882)	$ (48,600)
Preferred dividends	(334)	0	(334)	0	(334)	(334)	(668)	(668)
Net loss applicable to common shares	$ (11,842)	$ (9,850)	$ (4,640)	$ (10,438)	$ (5,622)	$ (16,060)	$ (20,700)	$ (30,550)
Net income (loss) per common share
Basic (in dollars per share)	$ (0.20)	$ (0.16)	$ (0.08)	$ (0.17)	$ (0.09)	$ (0.27)	$ (0.34)	$ (0.51)
Diluted (in dollars per share)	$ (0.20)	$ (0.16)	$ (0.08)	$ (0.17)	$ (0.09)	$ (0.27)	$ (0.34)	$ (0.51)
Weighted average number of common shares outstanding
Basic (in shares)	60,096,852	60,065,978	60,065,053	60,059,936	60,053,912	60,056,924	60,059,594	60,061,243
Diluted (in shares)	60,096,852	60,065,978	60,065,053	60,059,936	60,053,912	60,056,924	60,059,594	60,061,243
Service
Revenue	$ 34,609	$ 32,989	$ 31,515	$ 29,733	$ 28,671	$ 58,404	$ 89,919	$ 122,908
Costs of sales	22,089	21,839	20,307	19,462	18,372	37,834	58,141	79,980
Product
Revenue	8,750	5,519	6,189	4,753	5,097	9,850	16,039	21,558
Costs of sales	$ 9,854	$ 6,930	$ 7,444	$ 5,589	$ 4,338	$ 9,927	$ 17,371	$ 24,301