SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Stock-Based Compensation, Stock Option Activity (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Assumptions used to estimate the fair values of the stock options granted [Abstract]
Expected dividend yield				0.00%
Additional Disclosures [Abstract]
Proceeds from stock option exercises				$ 61,725	$ 1,736,946
Reversal of recognized stock compensation expense	$ 200,000
Minimum
Assumptions used to estimate the fair values of the stock options granted [Abstract]
Risk-free interest rate				0.34%
Expected term of option				5 years 6 months
Expected stock price volatility				39.50%
Maximum
Assumptions used to estimate the fair values of the stock options granted [Abstract]
Risk-free interest rate				1.61%
Expected term of option				6 years 3 months
Expected stock price volatility				41.50%
Stock Options and Restricted Stock Awards | Restructuring
Additional Disclosures [Abstract]
Stock-based compensation expense		$ 190,000
Restricted Stock Awards
Additional Disclosures [Abstract]
Unrecognized compensation cost	181,000			$ 181,000
Recognized compensation period				1 year
Restricted Stock Awards | General and Administrative
Additional Disclosures [Abstract]
Stock-based compensation expense	$ 193,000		$ 0	$ 337,000	0
Stock Options
Stock Options Activity [Roll Forward]
Outstanding, beginning of period (in shares)		189,187		189,187
Grants (in shares)				182,000
Exercised (in shares)				(1,500)
Forfeited (in shares)				(137,500)
Outstanding, end of period (in shares)	232,187			232,187		189,187
Exercisable, end of period (in shares)	52,687			52,687
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of period (in dollars per share)		$ 46.79		$ 46.79
Grants (in dollars per share)				61.37
Exercised (in dollars per share)				41.15
Forfeited (in dollars per share)				55.79
Outstanding, end of period (in dollars per share)	$ 56.02			56.02		$ 46.79
Exercisable, end of period (in dollars per share)	$ 39.70			$ 39.70
Weighted Average Remaining Contractual Term [Roll Forward]
Outstanding				8 years 1 month 13 days		8 years 7 months 13 days
Grants				0 years
Exercised				0 years
Forfeited				0 years
Exercisable				2 years 6 months
Aggregate Intrinsic Value [Roll Forward]
Outstanding, beginning of period		$ 1,920,684		$ 1,920,684
Grants				0
Exercised				0
Forfeited				0
Outstanding, end of period	$ 1,222,261			1,222,261		$ 1,920,684
Exercisable, end of period	$ 1,136,761			$ 1,136,761
Additional Disclosures [Abstract]
Weighted average grant date fair value of stock granted (in dollars per share)				$ 61.37
Proceeds from stock option exercises				$ 100,000	1,700,000
Closing price of common stock (in dollars per share)	$ 61.28			$ 61.28
Unrecognized compensation cost	$ 4,300,000			$ 4,300,000
Recognized compensation period				8 years 1 month 6 days
Stock Options | General and Administrative
Additional Disclosures [Abstract]
Stock-based compensation expense	$ 31,000		$ 119,000	$ 136,000	$ 260,000