Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net revenues - external	$ 26,566	$ 25,125	$ 75,863	$ 72,677
Net revenues - internal	0	0	0	0
Total net revenues	26,566	25,125	75,863	72,677
Gross profit	15,258	15,122	44,884	43,763
Selling, general and administrative expenses	15,609	11,869	43,666	35,971
Interest expense	(270)	(283)	(909)	(1,018)
Other (expense) income	(44)	8	(150)	(20)
Benefit from income taxes	217	(38)	874	(92)
Net (loss) income	(448)	2,940	1,033	6,662
Total assets	94,786	80,308	94,786	80,308	$ 96,991
Purchases of medical equipment	4,702	3,172	9,645	11,955
Depreciation and amortization of intangible assets	3,740	3,560	10,969	10,492
Corporate and Eliminations
Segment Reporting Information [Line Items]
Net revenues - external	0	0	0	0
Net revenues - internal	(1,440)	(1,459)	(4,484)	(3,955)
Total net revenues	(1,440)	(1,459)	(4,484)	(3,955)
Gross profit	0	0	0	0
Selling, general and administrative expenses	15,609	11,869	43,666	35,971
Interest expense	(270)	(283)	(909)	(1,018)
Other (expense) income	(44)	8	(150)	(20)
Benefit from income taxes	217	(38)	874	(92)
Total assets	2,000	2,000	2,000	2,000
Purchases of medical equipment	0	0	0	0
Depreciation and amortization of intangible assets	0	0	0	0
ITS Segment | Operating Segments
Segment Reporting Information [Line Items]
Net revenues - external	16,581	15,638	48,826	45,369
Net revenues - internal	0	0	0	0
Total net revenues	16,581	15,638	48,826	45,369
Gross profit	10,574	10,095	31,028	29,480
Total assets	59,312	51,547	59,312	51,547
Purchases of medical equipment	4,058	1,685	7,550	6,705
Depreciation and amortization of intangible assets	2,785	2,694	8,213	8,042
DME Services Segment | Operating Segments
Segment Reporting Information [Line Items]
Net revenues - external	9,985	9,487	27,037	27,308
Net revenues - internal	1,440	1,459	4,484	3,955
Total net revenues	11,425	10,946	31,521	31,263
Gross profit	4,684	5,027	13,856	14,283
Total assets	33,474	26,761	33,474	26,761
Purchases of medical equipment	644	1,487	2,095	5,250
Depreciation and amortization of intangible assets	$ 955	$ 866	$ 2,756	$ 2,450