Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Jan. 01, 2022	Nov. 15, 2019	Jun. 10, 2014
Tax expense (benefit) for unrealized holding gain (loss) on available-for-sale investments	$ 0	$ 37,000	$ 0	$ 37,000
Accounting Standards Update [Extensible Enumeration]					Accounting Standards Update 2020-06 [Member]
3.25% Convertible Notes | Convertible Debt
Stated interest rate								3.25%
1.75% Convertible Notes | Convertible Debt
Stated interest rate						1.75%	1.75%