It took less than a week for Nevada to start running out of legal marijuana

That was quick.

It's been less than a week since Nevada started selling recreational marijuana and the state's dispensaries are already running out.

With lines out the door from the moment the new law went into effect early Sunday morning, the state's 47 dispensaries are struggling to keep up with the demand, according to the Reno-Gazette Journal.

The Nevada Dispensary Association estimates there has already been as much as $3 million in marijuana sales, which would amount to about $1 million in tax revenue for the state, according to the Reno-Gazette Journal.

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Supply is starting to run so low that the state's government is now considering "emergency regulations" that will fast-track the approval process for more distributors. State law requires all sellers to obtain supply from licensed distributors.

Existing distributors have apparently been struggling to keep up with the surge in demand, and licenses for new distributors have been held up by regulatory issues.

If state officials don't address the supply problems then some of the state's dispensaries could run out "within the next several days," Stephanie Klapstein, a spokesperson for the Nevada Tax Commission, said.