Note 10 - Commitments and Contingencies (Details Textual)	Jul. 13, 2020 USD ($)
Short Term Investment Minimum	$ 1,000,000

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios, and adherence to certain clauses which must be met in order to avoid default. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

No definition available.

Name:	thmo_ShortTermInvestmentMinimum
Namespace Prefix:	thmo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant