Note 17 - Special Purpose Acquisition Company	3 Months Ended
Mar. 31, 2021
Notes to Financial Statements
Special Purpose Acquisition Company [Text Block]	NOTE 17. SPECIAL PURPOSE ACQUISITION COMPANY In October 2020, our subsidiary BOC Yellowstone LLC, which we refer to as “BOC Yellowstone,” served as sponsor for the underwritten initial public offering of a special purpose acquisition company named Yellowstone Acquisition Company, which we refer to as “Yellowstone.” Yellowstone sold in its public offering 13,598,898 units at a price of $10.00 per unit, each unit consisting of one share of Class A common stock and a redeemable warrant to purchase one-half of a share of Class A common stock at an exercise price of $11.50 per share. Between August and November 2020, we invested, through BOC Yellowstone, approximately $7.8 million through the purchase of 3,399,724 shares of Class B common stock and 7,719,779 non-redeemable private placement warrants, each warrant entitling us to purchase one share of Class A common stock at $11.50 per share. BOC Yellowstone, as the sponsor of Yellowstone and under the terms of the public offering, owns approximately 20% of Yellowstone's issued and outstanding common stock. The purpose of the offering is to pursue a business combination in an industry other than the three industries in which we currently own and operate businesses: outdoor advertising, surety insurance and broadband services businesses. Yellowstone allows us to pursue a minority interest in larger companies in other industries without diluting the equity interests of our Boston Omaha shareholders. Yellowstone is currently focusing on acquisition candidates in the homebuilding, home materials, financial services and commercial real estate management industries but is also able to pursue acquisition opportunities in other industries. The Units were sold at a price of $10.00 per unit, generating gross proceeds to Yellowstone of $125,000,000, and trade on the NASDAQ Stock Market, LLC under the ticker symbol “YSACU”. After the securities comprising the units began separate trading, the shares of Class A common stock and warrants were listed on NASDAQ under the symbols “YSAC” and “YSACW,” respectively. On November 16, 2020, BOC Yellowstone transferred to BOC Yellowstone II LLC, which we refer to as “BOC Yellowstone II”, 206,250 shares of Class B common stock for no consideration. All other shares of Class B common stock are owned by BOC Yellowstone. BOC Yellowstone sold to the lead investor in Yellowstone’s IPO a membership interest in BOC Yellowstone II for a purchase price of $309,375. Upon the completion of any business combination, BOC Yellowstone has agreed to transfer the 206,250 shares of Class B common stock to this investor. Any Class B common stock ultimately distributed to the investor is subject to all restrictions imposed on BOC Yellowstone, including but not limited to, waiver of redemption rights in connection with completion of any initial business combination and rights to liquidating distributions from Yellowstone's trust account if Yellowstone fails to complete an initial business combination. Any shares held by such investor will be subject to the anti-dilution provisions for the Class B common stock and the impact thereof. BOC Yellowstone is the sole managing member of BOC Yellowstone II. We have determined that (i) Yellowstone is a Variable Interest Entity, (ii) we are the primary beneficiary, and (iii) it is appropriate to consolidate Yellowstone under applicable accounting guidance outlined within ASC 810, Consolidation. As a result, both the Founders Shares and Private Placement Warrants now eliminate in consolidation.

Note 17 - Special Purpose Acquisition Company

3 Months Ended

Mar. 31, 2021

Special Purpose Acquisition Company [Text Block]

NOTE 17. SPECIAL PURPOSE ACQUISITION COMPANY

In October 2020, our subsidiary BOC Yellowstone LLC, which we refer to as “BOC Yellowstone,” served as sponsor for the underwritten initial public offering of a special purpose acquisition company named Yellowstone Acquisition Company, which we refer to as “Yellowstone.” Yellowstone sold in its public offering 13,598,898 units at a price of $10.00 per unit, each unit consisting of one share of Class A common stock and a redeemable warrant to purchase one-half of a share of Class A common stock at an exercise price of $11.50 per share. Between August and November 2020, we invested, through BOC Yellowstone, approximately $7.8 million through the purchase of 3,399,724 shares of Class B common stock and 7,719,779 non-redeemable private placement warrants, each warrant entitling us to purchase one share of Class A common stock at $11.50 per share. BOC Yellowstone, as the sponsor of Yellowstone and under the terms of the public offering, owns approximately 20% of Yellowstone's issued and outstanding common stock. The purpose of the offering is to pursue a business combination in an industry other than the three industries in which we currently own and operate businesses: outdoor advertising, surety insurance and broadband services businesses. Yellowstone allows us to pursue a minority interest in larger companies in other industries without diluting the equity interests of our Boston Omaha shareholders. Yellowstone is currently focusing on acquisition candidates in the homebuilding, home materials, financial services and commercial real estate management industries but is also able to pursue acquisition opportunities in other industries. The Units were sold at a price of $10.00 per unit, generating gross proceeds to Yellowstone of $125,000,000, and trade on the NASDAQ Stock Market, LLC under the ticker symbol “YSACU”. After the securities comprising the units began separate trading, the shares of Class A common stock and warrants were listed on NASDAQ under the symbols “YSAC” and “YSACW,” respectively.

On November 16, 2020, BOC Yellowstone transferred to BOC Yellowstone II LLC, which we refer to as “BOC Yellowstone II”, 206,250 shares of Class B common stock for no consideration. All other shares of Class B common stock are owned by BOC Yellowstone. BOC Yellowstone sold to the lead investor in Yellowstone’s IPO a membership interest in BOC Yellowstone II for a purchase price of $309,375. Upon the completion of any business combination, BOC Yellowstone has agreed to transfer the 206,250 shares of Class B common stock to this investor. Any Class B common stock ultimately distributed to the investor is subject to all restrictions imposed on BOC Yellowstone, including but not limited to, waiver of redemption rights in connection with completion of any initial business combination and rights to liquidating distributions from Yellowstone's trust account if Yellowstone fails to complete an initial business combination. Any shares held by such investor will be subject to the anti-dilution provisions for the Class B common stock and the impact thereof. BOC Yellowstone is the sole managing member of BOC Yellowstone II.

We have determined that (i) Yellowstone is a Variable Interest Entity, (ii) we are the primary beneficiary, and (iii) it is appropriate to consolidate Yellowstone under applicable accounting guidance outlined within ASC 810, Consolidation. As a result, both the Founders Shares and Private Placement Warrants now eliminate in consolidation.