Segment Results and Concentrations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Net sales, gross profit and gross margin by segment [Abstract]
Net sales	$ 46,992	$ 47,487
Gross profit	$ 16,183	$ 15,071
Gross margin (in hundredths)	34.40%	31.70%
Beer Related \| Operating Segments
Net sales, gross profit and gross margin by segment [Abstract]
Net sales	$ 40,789	$ 41,476
Gross profit	$ 15,508	$ 14,710
Gross margin (in hundredths)	38.00%	35.50%
Brewpubs \| Operating Segments
Net sales, gross profit and gross margin by segment [Abstract]
Net sales	$ 6,203	$ 6,011
Gross profit	$ 675	$ 361
Gross margin (in hundredths)	10.90%	6.00%
Sales
Sales and receivables from Anheuser-Busch, LLC [Abstract]
Percentage of concentration	81.20%	76.60%
Accounts Receivable
Sales and receivables from Anheuser-Busch, LLC [Abstract]
Percentage of concentration	80.00%		79.80%

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Gross margin is entity's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as percentage.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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