SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Credit terms, billing term, lower limit							10 days
Credit terms, billing term, upper limit							90 days
Allowances for doubtful accounts							$ 273	$ 428
Contract liabilities							400
Contract assets							100
Advertising expense							1,500	800	$ 1,100
Research and development	$ 1,016	$ 730	$ 613	$ 1,618	$ 2,634	$ 1,890	$ 3,731	$ 2,549	$ 1,941
Renuvion/J-Plasma generators
Product warranty							4 years
Mounting Fixtures
Product warranty							2 years
Accessories
Product warranty							1 year