CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2018
Operating activities:
Net (loss) income	$ (214)	$ (68)	$ 354	$ 395	$ (721)	$ 1,028
Adjustments to reconcile net (loss) income to net cash from operating activities (excluding assets acquired and liabilities assumed):
Depreciation and amortization					5,209	5,772
Non cash lease expense					215	189
Deferred income taxes					(192)	(214)
Stock-based compensation expense	80		62		189	170	$ 108
Accrued interest on lease financing					0	9
Interest expense associated with lease liabilities					52	59
Changes in operating assets and liabilities:
Receivables					2,242	(896)
Prepaid expenses and other assets					687	(559)
Accounts payable, accrued liabilities and deferred revenue					784	817
Income taxes payable					(141)	0
Lease liability					(267)	(248)
Net insurance proceeds receivable					0	160
Net cash provided by operating activities					8,057	6,287
Investing activities:
Payment for purchase of property and equipment					(328)	(889)
Payment for acquisition, net of cash acquired					(2,084)	0
Proceeds from sale of equipment					150	0
Net cash used in investing activities					(2,262)	(889)
Financing activities:
Principal payments on long-term debt					(1,386)	(1,564)
Principal payments on finance leases					(2,559)	(3,155)
Principal payments on short-term financing					(459)	0
Distributions to non-controlling interests					(582)	(865)
Proceeds from options exercised					0	41
Proceeds from financing for acquisition					1,425	0
Debt issuance costs long-term debt					(30)	0
Net cash used in financing activities					(3,591)	(5,543)
Net change in cash, cash equivalents, and restricted cash					2,204	(145)
Cash, cash equivalents, and restricted cash at beginning of period		$ 1,779		$ 1,792	1,779	1,792
Cash, cash equivalents, and restricted cash at end of period	$ 3,983		$ 1,647		3,983	1,647	$ 1,792
Supplemental cash flow disclosure:
Interest					803	1,015
Income taxes paid					335	418
Schedule of non-cash investing and financing activities
Lease reassessment right of use assets and lease liabilities					67	0
Right of use assets and lease liabilities					135	1,362
Interest capitalized to property and equipment					97	82
Acquisition of equipment with finance leases					369	1,293
Acquisition of equipment with long-term debt financing					1,184	0
Acquisition of insurance with short-term financing					45	0
First working capital payment related to acquisition, witholding taxes					43	0
Estimated subsequent working capital payment for acquisition					$ 354	$ 0