REVENUE - Revenue Estimate By Geographic Area (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 35,805,858	$ 30,094,154	$ 64,194,321	$ 54,819,600
United States
Disaggregation of Revenue [Line Items]
Total revenue	16,118,729	16,497,347	31,671,767	29,007,097
China
Disaggregation of Revenue [Line Items]
Total revenue	9,987,370	3,127,723	12,011,879	7,646,920
Canada
Disaggregation of Revenue [Line Items]
Total revenue	3,958,167	5,217,535	8,133,364	8,315,899
Continental Europe
Disaggregation of Revenue [Line Items]
Total revenue	2,897,562	1,974,328	5,691,304	3,396,060
United Kingdom
Disaggregation of Revenue [Line Items]
Total revenue	630,720	926,925	1,747,148	1,810,283
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	1,141,191	1,059,560	1,911,235	1,931,518
Latin America
Disaggregation of Revenue [Line Items]
Total revenue	484,358	512,680	962,053	998,809
Middle East/Africa
Disaggregation of Revenue [Line Items]
Total revenue	561,510	720,347	1,850,566	1,603,479
Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 26,251	$ 57,709	$ 215,005	$ 109,535