Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 82,289	$ (30,098)
Other comprehensive income (loss):
Foreign currency translation adjustment	7	(56)
Other comprehensive income (loss)	7	(56)
Comprehensive income (loss)	$ 82,296	$ (30,154)