Rigel Pharmaceuticals, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- DOCUMENT AND ENTITY INFORMATION
Financial Statements
Notes to Financial Statements
Accounting Policies
- DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)
Notes Tables
Notes Details

STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details)

v3.22.0.1

STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details) $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Jul. 01, 2020 USD ($)	Jan. 31, 2021 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 $ / shares shares
Stock Based Compensation
Weighted-average recognition period of unrecognized compensation cost			2 years 9 months 7 days
Employee stock
Stock Based Compensation
Purchase price expressed as a percentage of fair market value of common stock on the first day of the offering period			85.00%
Purchase price expressed as a percentage of fair market value of common stock on the purchase date			85.00%
Number of shares of common stock issued			932,018	567,391	747,691
Average price of shares issued (in dollars per share) \| $ / shares			1.51	1.54	1.92
Weighted average fair value of stock purchased (in dollars per share) \| $ / shares				$ 0.87	$ 1.07
Additional shares approved		5,500,000
Number of shares of common stock available for future issuance			4,584,484
Award offering period	2 years		2 years
Total incremental fair value for the Purchase Plan reset \| $	$ 0.5		$ 0.8
Unrecognized compensation cost related to purchase plan \| $			$ 0.1
Weighted-average recognition period of unrecognized compensation cost			2 months 1 day

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