Note 7 - Borrowings - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Borrowings, as of December 31, 2019	$ 8,967	$ 7,486
CRG [Member] \| Loan Agreement [Member]
2020
2021	3,400
2022	6,266
2023	4,518
	14,184
Less: Amount of PIK additions and facility fee to be accreted subsequent to December 31, 2019	(4,629)
Less: Amount representing debt financing costs	(588)
Borrowings, as of December 31, 2019	$ 8,967

Cumulative paid-in-kind interest treated as additional principal and added to the total carrying amount of the debt.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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