Stockholders' Equity - Restricted Stock Purchased and Retired (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, $ in Thousands					1 Months Ended	12 Months Ended
Nov. 30, 2018	May 31, 2018	Apr. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of Shares Purchased	145,920	107	181,486	43,638	9,846	57,980	29,189	18,147	115,162	371,151
Actual Price Paid Per Share (in dollars per share)	$ 2.27	$ 2.80	$ 3.09	$ 3.25	$ 1.45	$ 1.45	$ 1.75	$ 1.34	$ 1.51	$ 2.79
Fair value of Re-Purchased Shares	$ 331,000		$ 560,000	$ 142,000	$ 14,000	$ 84,000	$ 51,000	$ 25,000	$ 174,000	$ 1,033,000

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Balance Type:	na
Period Type:	duration