Shareholders Equity - Purchases of Equity Shares (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended							12 Months Ended
	May 20, 2019	Nov. 30, 2019	Oct. 31, 2019	Sep. 30, 2019	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	May 31, 2019	Dec. 31, 2019
Shareholders' Equity
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1,367,762
Shares Repurchased As A Percentage Of Outstanding Common Shares	5.00%
Stock Repurchase Program, Authorized Amount	$ 2.5
Total number of shares purchased		290,259	42,307	14,797	56,432	55,112	221,041	16,148	696,096
Average price paid per share		$ 3.41	$ 3.38	$ 3.79	$ 3.66	$ 3.90	$ 4.12	$ 4.17	$ 3.72
Maximum number of shares that may yet be purchased under the plans or programs	1,367,762								671,666