Equity (Narrative) (Details) - $ / shares		12 Months Ended
	May 18, 2017	Dec. 31, 2020	Dec. 31, 2019	Sep. 12, 2019
Equity [Abstract]
Capital units authorized		21,500,000
Common stock, shares authorized		20,000,000	20,000,000
Common stock, par value		$ 0.001	$ 0.001
Preferred stock, shares authorized		1,500,000
Preferred stock, par value		$ 0.001
Common stock, issued		11,822,000	12,272,000
Preferred stock, issued		0
Increase in the number of shares authorized	600,000
Shares authorized for issuance	1,600,000
Additional shares authorized for repurchase				2,000,000
Stock repurchased		46,000	296,000
Remaining number of shares authorized to be repurchased		2,323,000