CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) $ in Millions	Dec. 31, 2020 USD ($)
$5.0 Million Convertible Debentures [Member]
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Face amount	$ 5.0

Face (par) amount of debt instrument at time of issuance.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant