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QUARTERLY FINANCIAL INFORMATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Total revenue $ 8,134 $ 6,820 $ 5,042 $ 3,436 $ 2,922 $ 3,627 $ 3,286 $ 3,477 $ 23,432 $ 13,313
Less: cost of revenue and operating expenses 4,542 3,885 3,108 2,953 2,404 3,005 3,436 3,827    
Income (loss) from operations 3,592 2,935 1,934 483 518 622 (150) (350) 8,944 640
Income (loss) before income taxes 3,348 2,244 1,540 362 223 532 (227) (444)    
Net income $ 3,308 $ 2,200 $ 1,504 $ 353 $ 208 $ 532 $ (227) $ (444) $ 7,365 [1] $ 69 [1]
Net income per common share:                    
Basic income per common share - net income $ 0.10 $ 0.07 $ 0.05 $ 0.01 $ 0.01 $ 0.02 $ (0.01) $ (0.01)    
Diluted income per common share - net income $ 0.10 $ 0.07 $ 0.05 $ 0.01 $ 0.01 $ 0.02 $ (0.01) $ (0.01)    
[1] There is no difference between net income and comprehensive income.