Income Taxes - Net Operating Loss Carryforwards (Details)	Dec. 31, 2017 USD ($)
Federal
Operating Loss Carryforwards [Line Items]
Net operating losses	$ 17,000
Federal | SimpleDevices
Operating Loss Carryforwards [Line Items]
Operating losses annual limitation	600,000
State
Operating Loss Carryforwards [Line Items]
Net operating losses	10,100,000
Foreign
Operating Loss Carryforwards [Line Items]
Net operating losses	$ 1,800,000