Organization and Significant Accounting Policies - Anti-dilutive Securities (Details) - shares shares in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Anti-dilutive securities outstanding that were excluded from the computation
Antidilutive securities	71	71
Stock options
Anti-dilutive securities outstanding that were excluded from the computation
Antidilutive securities	13	13
Warrants - employee
Anti-dilutive securities outstanding that were excluded from the computation
Antidilutive securities	49	49
Warrants - non employee
Anti-dilutive securities outstanding that were excluded from the computation
Antidilutive securities	9	9

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration