Rigel Pharmaceuticals, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- DOCUMENT AND ENTITY INFORMATION
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Stock-Based Compensation - Options (Details)

v3.19.3

Stock-Based Compensation - Options (Details)	3 Months Ended		9 Months Ended
Stock-Based Compensation - Options (Details)	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) item $ / shares shares	Sep. 30, 2018 USD ($)
Stock Based Compensation
Share-based compensation \| $	$ 2,098,000	$ 2,995,000	$ 7,704,000	$ 5,647,000
Additional disclosures
Shares of common stock available for grant	16,829,605		16,829,605
Employee stock option
Stock Based Compensation
Number of homogenous groups for purposes of determining fair values of options \| item			3
Contractual term of the option			10 years
Weighted-average assumptions relating to options granted
Risk-free interest rate (as a percent)	1.70%	2.90%	2.50%	2.70%
Expected term (in years)	6 years	6 years	6 years 6 months	6 years 8 months 12 days
Dividend yield (as a percent)	0.00%	0.00%	0.00%	0.00%
Expected volatility (as a percent)	63.00%	67.90%	65.60%	65.10%
Additional disclosures
Options granted (in shares)			6,780,575
Grant-date weighted-average fair value (in dollars per share) \| $ / shares			$ 1.26
Options exercised during the period (in shares)			34,897
Employee stock option \| Vesting upon achievement of corporate performance-based milestones
Additional disclosures
Options outstanding	100,000		100,000
Total unrecognized compensation costs \| $	$ 192,000		$ 192,000
Employee stock option \| Consultant
Stock Based Compensation
Contractual term of the option			10 years
Employee stock option \| Recipient of performance shares
Additional disclosures
Total unrecognized compensation costs \| $	$ 10,700,000		$ 10,700,000

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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