Minimum cash required for covenant related to credit facility.

No definition available.

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- Definition

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Face amount or stated value per share of common stock.

+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Balance Type:	credit
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- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

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- Definition

The cash inflow from the additional capital contribution to the entity.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

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Number of new stock issued during the period.

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Note 1 - The Company and Basis of Presentation (Details Textual) - USD ($)						1 Months Ended	3 Months Ended
	Dec. 11, 2020	Jul. 21, 2020	Jun. 22, 2020	Nov. 06, 2019	Dec. 21, 2018	Jul. 21, 2020	Apr. 04, 2021	Mar. 29, 2020	Jan. 03, 2021	May 06, 2020	Sep. 28, 2019	Dec. 20, 2018
Restructuring Charges, Total							$ 0	$ 479,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance							20,935,000		$ 22,748,000
Line of Credit, Current							$ 15,000,000		$ 15,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)							$ 0.001		$ 0.001
Proceeds from Issuance of Common Stock							$ 0	$ 357,000
Underwritten Public Offering [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.001
Common Stock [Member] \| Underwritten Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)			2,500,000
Shares Issued, Price Per Share (in dollars per share)			$ 3.50
Proceeds from Issuance of Common Stock			$ 8,800,000			$ 8,100,000
Payments of Stock Issuance Costs			$ 1,100,000
Common Stock [Member] \| Exercise of Option for Overallotment of Shares by Underwriters [Member]
Stock Issued During Period, Shares, New Issues (in shares)		141,733	375,000
Proceeds from Issuance of Common Stock		$ 500,000
Payments of Stock Issuance Costs		$ 52,000
Common Stock [Member] \| Underwritten Public Offering, Including Exercise of Overallotment Options by Underwriters [Member]
Proceeds from Issuance of Common Stock						9,300,000
Payments of Stock Issuance Costs						$ 1,200,000
Heritage Bank of Commerce [Member] \| Paycheck Protection Program [Member]
Notes Payable, Noncurrent, Total							1,200,000
Debt Instrument, Interest Rate, Stated Percentage										1.00%
Debt Instrument, Face Amount										$ 1,200,000
Heritage Bank of Commerce [Member] \| Revolving Credit Facility [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance							20,900,000
Line of Credit, Current							$ 15,000,000.0		$ 15,000,000.0
Line of Credit Facility, Maximum Borrowing Capacity					$ 15,000,000.0						$ 9,000,000.0	$ 9,000,000.0
Minimum Cash Required for Covenant Related to Credit Facility					$ 3,000,000.0
Line of Credit Facility, Expiration Period (Year)	1 year				1 year
Debt Instrument, Interest Rate, Stated Percentage				5.50%
Debt Instrument, Interest Rate, Effective Percentage							3.75%		3.75%
Heritage Bank of Commerce [Member] \| Revolving Credit Facility [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%			0.50%