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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Total Revenue	$ 40,367	$ 34,785	$ 31,022	$ 24,127	$ 25,605	$ 20,026	$ 19,263	$ 15,228	$ 130,301	$ 80,122
Less: cost of revenue and operating expenses	28,780	26,739	27,209	25,207	23,308	18,617	15,178	12,770	107,935	69,873
Income from operations	11,587	8,046	3,813	(1,080)	2,297	1,409	4,085	2,458	22,366	10,249
Income before income taxes	11,562	8,028	3,768	(1,087)	2,215	1,404	4,080	2,454
Net income	$ 8,894	$ 6,107	$ 2,808	$ (706)	$ 1,787	$ 1,333	$ 3,017	$ 2,937	$ 17,103	$ 9,074
Net income per common share:
Basic income per share - net income	$ 0.23	$ 0.16	$ 0.07	$ (0.02)	$ 0.05	$ 0.04	$ 0.08	$ 0.08
Diluted income per share - net income	$ 0.23	$ 0.16	$ 0.07	$ (0.02)	$ 0.05	$ 0.03	$ 0.08	$ 0.08

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