Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 16,716	$ 11,491
Depreciation, Depletion and Amortization	627	888
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Share-based compensation expense	1,734	1,638
Earnest Money Deposits and Pre-acquisition Costs Written-Off	3,440	466
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0	454	$ (5,300)
Deferred income taxes, net	0	(955)
Income (Loss) from Equity Method Investments	(2,565)	(1,846)
Distributions of income from unconsolidated entities	1,657	272
Changes in operating assets and liabilities:
(Increase) decrease in receivables	(1,301)	2,069
Increase in inventory	(16,884)	(21,720)
(Increase) decrease in earnest money deposits	(7,436)	3,319
Increase in other assets	(1,595)	(2,068)
Increase (decrease) in accounts payable	(1,288)	4,451
Increase in accrued expenses	6,850	2,855
Increase (Decrease) in Contract with Customer, Liability	1,369	1,643
Net cash provided by (used in) operating activities	1,162	(9,231)
Cash flows from investing activities:
Purchase of property and equipment	(1,054)	(571)
Net cash used in investing activities	(1,054)	(571)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings from lines of credit	126,000	37,000
Repayments of Lines of Credit	48,000	31,000
Payment, Tax Withholding, Share-based Payment Arrangement	592	544
Payments for Repurchase of Common Stock	0	60
Contributions of LLC Members	400	0
Payments to Noncontrolling Interests	2,970	10,735
Net cash provided by (used in) financing activities	74,838	(5,339)
Net increase (decrease) in cash and cash equivalents and restricted cash	74,946	(15,141)
Cash and cash equivalents, beginning of period		38,315	38,315
Restricted cash, beginning of period	4,416	3,440	3,440
Cash and cash equivalents and restricted cash, beginning of period	37,685	41,755	41,755
Cash and cash equivalents, end of period		23,873
Restricted cash, end of period	6,771	2,741	4,416
Cash and cash equivalents and restricted cash, end of period	112,631	26,614	$ 37,685
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	0	0
Income Taxes Paid, Net	(137)	0
Earnest Money Deposits and Pre-acquisition Costs Written-Off	$ 3,440	$ 466