Shareholders Equity	3 Months Ended
Mar. 31, 2021
Equity [Abstract]
Shareholders Equity	7. Shareholders’ Equity Preferred Stock As of March 31, 2021 and December 31, 2020, 3,906 shares of Series C-1² Convertible Preferred Stock (“Series C-1²Preferred”) were issued, outstanding and convertible into 6,735,378 shares of common stock. As of March 31, 2021 and December 31, 2020, the Series C-1² Preferred liquidation preference was approximately $3.9 million. The Series C-1² Preferred does not pay a dividend. The holders of the Series C-1² Preferred do not have voting rights, other than for general protective rights required by the California General Corporation Law.

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

Name:	us-gaap_StockholdersEquityNoteDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration