STOCKHOLDERS' EQUITY: - Directors Stock Award Plan (Details) - Directors' Stock Award Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Share based Compensation Plan
Common shares received on election as director	1,600
Additional shares issued at each annual general meeting	1,600
Total SCC shares reserved for the plan	600,000	600,000
Period of extension of plan	5 years
Numbers of shares shall be granted quarterly and conditioned upon the attendance of each director to each Board meeting	400
Stock based compensation expense	$ 0.4	$ 0.3
Activity in directors' stock award plan
Total shares granted at the beginning of the period (in shares)	(428,800)	(416,800)
Granted (in shares)	(15,600)	(12,000)
Total shares granted at the end of the period (in shares)	(444,400)	(428,800)
Remaining shares reserved	155,600	171,200