Cash, Cash Equivalents and Short-Term Investments (Details Textual)	6 Months Ended
Jun. 30, 2020
Cash, Cash Equivalents and Short-Term Investments (Textual)
Debt covenant, description	In compliance with a bank debt covenant, we held at least $1,400,000 of otherwise unrestricted cash, cash equivalents and short-term investments in an escrow account (a non-current asset) in favor of the bank as of June 30, 2020. As of December 31, 2019, we were required to maintain at least $2,000,000 of otherwise unrestricted cash, cash equivalents and short-term investments in compliance with a bank debt covenant.

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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