Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Cash Flows From Operating Activities:
Net income	$ 4,009	$ 709	$ 2,225	$ 2,327
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of premiums/discounts on securities, net			(7)	42
Loss on sale of loans			62	114
Gain on sale of real property			(4,412)
Gain on derivatives			(58)
Provision for loan losses (Note 5)	620	14	2,037	163	$ 258
Depreciation and amortization	652	567	1,878	1,626
ESOP compensation			402	574
Share-based compensation expense			1,049	999
Deferred income taxes			131	(166)
Changes in assets and liabilities:
Increase in loans held for sale			(1,521)	(1,030)
Increase in accrued interest receivable			(6,013)	(98)
(Increase) decrease in other assets			(7,393)	12
(Decrease) increase in accrued interest payable			(39)	18
Increase in advance payments by borrowers			1,391	1,743
Increase in loan funding payable			220
Increase (decrease) in other liabilities			7,415	(1,301)
Net cash (used in) provided by operating activities			(2,633)	5,023
Cash Flows From Investing Activities:
Business acquisition, net of cash acquired			(1,005)
Proceeds from redemption of FHLBNY stock			4,378	6,795
Purchases of FHLBNY Stock			(5,057)	(12,539)
Purchases of available-for-sale securities			(10,113)	(30,000)
Proceeds from maturities, calls and principal repayments on available-for-sale securities			17,288	5,491
Placements with banks			(2,739)
Proceeds from sales of loans			3,977	3,660
Net increase in loans			(159,295)	(32,946)
Proceeds from sale of real property			4,743
Purchases of premises and equipment			(1,336)	(3,296)
Net cash used in investing activities			(149,159)	(62,835)
Cash Flows From Financing Activities:
Net increase (decrease) in deposits			191,201	(51,913)
Repurchase of treasury stock			(3,803)	(12,663)
Proceeds from advances from FHLBNY			184,730	517,398
Repayments of advances from FHLBNY			(171,851)	(417,398)
Net advances on warehouse lines of credit			(70)
Net cash provided by financing activities			200,207	35,424
Net increase (decrease) in cash and cash equivalents			48,415	(22,388)
Cash and Cash Equivalents:
Beginning			27,677	69,778	69,778
Ending	$ 76,092	$ 47,390	76,092	47,390	$ 27,677
Supplemental disclosures of cash flow information:
Cash paid for interest on deposits and borrowings			8,769	9,160
Cash paid for income taxes			98	$ 888
Non-cash assets acquired:
Mortgage loans held for sale, at fair value			10,549
Premises and equipment, net			302
Other assets			772
Total non-cash assets acquired			11,623
Liabilities assumed:
Warehouse lines of credit			9,135
Mortgage loans funding payable			1,237
Other liabilities			246
Total liabilities assumed			10,618
Net non-cash assets acquired			1,005
Cash and cash equivalents acquired			750
Consideration paid			$ 1,755