STOCKHOLDERS' EQUITY AND EMPLOYEE STOCK PLANS - Activity of Nonvested Shares of Restricted Stock and Restricted Stock Units (Details) - 2016 Plan - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Unvested RSAs
Shares
Balance at the beginning of the period (in shares)	229,650	249,565
Granted (in shares)	196,955	120,872
Vested (in shares)	(151,828)	(140,537)
Forfeited (in shares)	(1,000)	(250)
Balance at the end of the period (in shares)	273,777	229,650
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 40.26	$ 27.81
Granted (in dollars per share)	26.43	50.48
Vested (in dollars per share)	36.01	26.96
Forfeited (in dollars per share)	29.77	45.47
Balance at the end of the period (in dollars per share)	$ 32.71	$ 40.26
Unvested RSUs
Shares
Balance at the beginning of the period (in shares)	52,298	71,440
Granted (in shares)	27,397	12,989
Vested (in shares)	(35,101)	(32,131)
Forfeited (in shares)	(73)	0
Balance at the end of the period (in shares)	44,521	52,298
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 41.67	$ 31.65
Granted (in dollars per share)	28.59	67.78
Vested (in dollars per share)	34.29	29.95
Forfeited (in dollars per share)	25.81	0
Balance at the end of the period (in dollars per share)	$ 39.47	$ 41.67