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GEOGRAPHIC AND SEGMENT INFORMATION GEOGRAPHIC AND SEGMENT INFORMATION - GEOGRAPHIC (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]                      
Sales $ 5,926,000 $ 3,672,000 $ 3,691,000 $ 3,397,000 $ 3,658,000 $ 2,651,000 $ 2,311,000 $ 1,614,000 $ 16,686,000 $ 10,234,000 $ 8,819,000
Domestic                      
Segment Reporting Information [Line Items]                      
Sales                 12,858,000 8,887,000 8,475,000
International                      
Segment Reporting Information [Line Items]                      
Sales                 $ 3,828 $ 1,347 $ 344