Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Fair Value of Financial Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Reported Value Measurement [Member]
Total financial instruments		$ 11,944,549
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments		11,723,785
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
Pacific Western Bank Note, A&R LSA [Member] | Reported Value Measurement [Member]
Total financial instruments	$ 15,878,121
Pacific Western Bank Note, A&R LSA [Member] | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
Pacific Western Bank Note, A&R LSA [Member] | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments	14,094,792
Pacific Western Bank Note, A&R LSA [Member] | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
Pacific Western Bank, Tranche 1 Note, A&R LSA [Member] | Reported Value Measurement [Member]
Total financial instruments		10,802,355
Pacific Western Bank, Tranche 1 Note, A&R LSA [Member] | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
Pacific Western Bank, Tranche 1 Note, A&R LSA [Member] | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments		10,412,650
Pacific Western Bank, Tranche 1 Note, A&R LSA [Member] | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
CSC Build-to-Suit Equipment Financing [Member] | Reported Value Measurement [Member]
Total financial instruments		1,142,194
CSC Build-to-Suit Equipment Financing [Member] | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments
CSC Build-to-Suit Equipment Financing [Member] | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments		1,311,135
CSC Build-to-Suit Equipment Financing [Member] | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Total financial instruments