Leases (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows (fixed payments)	$ 143,000	$ 141,000	$ 495,000	$ 384,000
Operating cash flows (liability reduction)	104,000	102,000	375,000	267,000
ROU assets obtained in exchange for lease obligations:
Operating leases	$ 0	$ 419,000	$ 14,000	$ 454,000