Equity Incentive Plans (Details) - USD ($)	1 Months Ended		3 Months Ended	12 Months Ended
	Jan. 31, 2021	May 31, 2020	May 31, 2017	Dec. 31, 2021	Jun. 30, 2018	May 31, 2016	May 31, 2014	May 31, 2010	May 31, 2007	May 31, 2005
Equity Incentive Plans (Details) [Line Items]
Common stock shares outstanding	42	22		616
Fair value (in Dollars)				$ 634
Common stock price per share (in Dollars per share)				$ 0.59
Compensation expense (in Dollars)				$ 482
Unrecorded unconditional purchase obligation term	5 years	5 years
Class of warrant or right exercise price of warrants or rights1 (in Dollars per share)	$ 1	$ 0.55
Fair value of warrant (in Dollars)	$ 60	$ 9
2016 Employee Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Equity based of grant shares					3,000	1,000
Employee Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Equity based of grant shares					2,700		2,600	1,600	1,100	500
2016 Director Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Equity based of grant shares						400
2005 Director Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Equity based of grant shares							600	400		200
Minimum [Member] | 2016 Employee Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Share based compensation arrangement by share based payment award other share increase decrease			100
Maximum [Member] | 2016 Employee Plan [Member]
Equity Incentive Plans (Details) [Line Items]
Share based compensation arrangement by share based payment award other share increase decrease			250