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Prepaid expenses and other current assets (Tables)

12 Months Ended

Dec. 31, 2018

Prepaid Expense and Other Assets, Current [Abstract]

Prepaid expenses and other current assets

Prepaid expenses and other current assets include the following at December 31, 2018 and 2017:

		2018				2017
Prepaid insurance		$	90,754			$	84,801
Prepaid supplies		19,422				33,132
Prepaid professional services		38,375				16,059
Prepaid rent and lease deposits		13,508				5,852
Other current assets		153,910				387,478
Total prepaid expenses and other current assets		$	315,969			$	527,322

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