STOCK-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS - Employee Stock Purchase Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Apr. 01, 2019	Dec. 31, 1999
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares authorized (in shares)	15,825,223
Share based compensation, shares authorized for future grant (in shares)	3,143,694
Proceeds from employee common stock purchases	$ 1,443,000		$ 1,382,000		$ 1,330,000
Employee stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares authorized (in shares)								2,321,688
Percentage of compensation eligible employees can use to purchase common stock, maximum	15.00%
Compensation amount that eligible employees can use to purchase common stock	$ 25,000
Percentage of fair market value eligible employees can purchase common stock as defined, minimum	85.00%
Share based compensation, shares authorized for future grant (in shares)	890,981
Employee stock purchase plan, shares purchased (in shares)		127,600		122,152		86,998
Employee stock purchase plan, per share price (in usd per share)		$ 11.31		$ 11.31		$ 15.29	$ 17.13
Proceeds from employee common stock purchases		$ 1,400,000		$ 1,400,000		$ 1,300,000