Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,614	$ 12,251
Reconciliation of Net Income to Net Cash Provided by Operating Activities:
Depreciation	412	470
Deferred tax expense	1,224	(4,709)
Loss on disposal of assets for lease	178	159
Bad debt expense	43	42
Stock-based compensation expense	190	282
Changes in Operating Assets and Liabilities:
Trade accounts receivable	(13)	(512)
Prepaid expenses and other assets	(1,315)	(122)
Other non-current assets	(416)
Accounts payable	(2)	389
Accrued expenses	264	109
Deferred revenue	5	734
Other current and non-current liabilities	416
Net Cash Provided by Operating Activities	9,600	9,093
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment	(103)	(106)
Notes receivable	(400)
Purchase of assets for lease	(219)	(1,102)
Net Cash Used in Investing Activities	(722)	(1,208)
CASH FLOWS FROM FINANCING ACTIVITIES:
Re-purchase of warrants		(2,687)
Exercise of stock options	174	60
Net Cash Provided by (Used in) Financing Activities	174	(2,627)
INCREASE IN CASH	9,052	5,258
CASH, BEGINNING OF PERIOD	7,741	3,284
CASH, END OF PERIOD	$ 16,793	$ 8,542