5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Nov. 30, 2019

Fair Value Disclosures [Abstract]

Fair value by hierarchy

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of November 30, 2019 (in thousands):

	Balance as of
	November 30, 2019		Level 1		Level 2		Level 3
Money market funds	$	1,838	$	1,838	$	—	$	—
Assets	$	1,838	$	1,838	$	—	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2019 (in thousands):

	Balance as of
	May 31, 2019		Level 1		Level 2		Level 3
Money market funds	$	3,017	$	3,017	$	—	$	—
Assets	$	3,017	$	3,017	$	—	$	—