STOCK COMPENSATION - RESTRICTED STOCK AND PERFORMANCE SHARE GRANTS - Compensation Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation costs	$ 3,734	$ 3,212	$ 4,731
1998 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expensed	2,731	2,281	3,742
Capitalized	482	335	460
Stock compensation costs	3,213	2,616	4,202
NDSI Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expensed	$ 521	$ 596	$ 529