4. FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Aug. 31, 2016

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 August 31, 2016 (in thousands):

	Balance as of
	August 31, 2016		Level 1		Level 2		Level 3
Money market funds	$	1	$	1	$	—	$	—
Certificate of deposit		50		—		50		—
Assets	$	51	$	1	$	50	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2016 (in thousands):

	Balance as of
	May 31, 2016		Level 1		Level 2		Level 3
Money market funds	$	1	$	1	$	—	$	—
Certificate of deposit		50		—		50		—
Assets	$	51	$	1	$	50	$	—